HomeServicesGSTGST Registration (Regular, Casual & Non-Resident Taxable Persons)

GST · GST Registration & Amendments

GST Registration (Regular, Casual & Non-Resident Taxable Persons)

GST registration is not a form submission — it is the moment your business enters the formal tax system.

Chartered Accountants · Chennai · Hyderabad · Bangalore · Dubai · Since 1986

2,000+Clients since 1986
42 yrsCA practice
4Offices · India & UAE
24 hrsResponse time

GST registration is not a form submission — it is the moment your business enters the formal tax system. A wrong category, a missed mandatory threshold, or a careless application locks you into the wrong scheme, blocks your input tax credit, and can expose you to penalties from the first transaction. At PNPC Global, we have guided businesses through GST registration since the regime launched in 2017 — and through every cascade of amendments, portal overhauls, and notification changes that followed. We do not submit your form and disappear. We categorise your business correctly, identify every state in which you are liable to register, select the right scheme for your specific business model, set up your return calendar, prepare your HSN/SAC mapping, and remain available by phone and WhatsApp when the first GST notice arrives. From a two-person startup in Chennai to a UAE-headquartered entity entering India, we have seen every registration scenario — and built the processes to handle them without error.

What it costs

Govt. feesGovernment & statutory fees as applicable to your case
Professional feeFixed professional fee — confirmed in writing before we start

No hidden charges. The exact figure is set in your engagement letter.

What GST Registration (Regular, Casual & Non-Resident Taxable Persons) is

GST — Goods and Services Tax — is a unified indirect tax that replaced the earlier patchwork of Central Excise Duty, Service Tax, VAT, Central Sales Tax, Entry Tax, Octroi, and several other levies with a single destination-based consumption tax, effective 1 July 2017. It is administered jointly by the Central Government and State Governments under a dual GST structure. The Central GST (CGST) Act, Integrated GST (IGST) Act, Union Territory GST (UTGST) Act, and the respective State GST Acts together form the legal framework. Registration under the GST law assigns your business a 15-digit GSTIN (Goods and Services Tax Identification Number) that uniquely identifies you in every tax transaction, GST return, e-invoice, and e-way bill. The GSTIN is state-specific: a business that operates across Tamil Nadu and Karnataka holds separate GSTINs for each state, with separate return obligations and separate officer jurisdictions.

The registration process flows through the unified GST portal — gst.gov.in — using Form REG-01, which upon submission generates an Application Reference Number (ARN) immediately. The ARN tracks your application through officer processing. The GST officer has 7 working days from filing (or from Aadhaar authentication, if opted) to either approve the registration by issuing a GSTIN via Form REG-06, raise a query via Form REG-03, or order physical verification. If a query is raised, the applicant has 7 working days to respond via REG-04, failing which the application is rejected via REG-05 and a fresh application must be filed. Once a GSTIN is issued, the business is required to charge applicable GST on all taxable supplies, file periodic returns (GSTR-1 for outward supplies and GSTR-3B for tax payment), maintain specified books of account, and remit the net tax liability after setting off input tax credit.

The GST regime covers three distinct categories of taxable persons beyond regular registered businesses. A Casual Taxable Person (CTP) is one who occasionally undertakes taxable transactions in a state or Union Territory where they have no fixed place of business — for example, a Mumbai-based exporter setting up a temporary stall at a trade fair in Bengaluru. A CTP must register before commencing supply, cannot apply online in the normal sense without a fixed address in that state, and must pay estimated tax in advance at the time of registration. The registration is valid for 90 days and can be extended once for another 90 days. A Non-Resident Taxable Person (NRTP) is one who occasionally undertakes taxable transactions in India but has no fixed place of business or residence in India. An NRTP must also register before commencing supply, appoint an authorised representative resident in India, and deposit an advance tax equal to the estimated tax liability. Both CTPs and NRTPs are placed in mandatory registration category under Section 24 of the CGST Act — no turnover threshold applies.

The Input Tax Credit (ITC) mechanism is the core design feature of GST that distinguishes it from the cascading taxes it replaced. Every registered supplier who purchases goods or services for use in taxable outward supplies may claim a credit for the GST paid on those purchases, offsetting it against the GST payable on their own output. This credit chain — from manufacturer to distributor to retailer — ensures that GST is effectively collected only on the value added at each stage, and the final tax burden falls on the end consumer. For a registered business, ITC transforms GST from a cost into a pass-through: your purchase invoice's GST becomes a credit that reduces your tax payment. This is why registration is not merely a legal obligation for eligible businesses — it is a financial advantage that has a real impact on margin.

When GST registration is required or strategically necessary

Annual aggregate turnover exceeds ₹40 lakh for goods suppliers (intra-state) or ₹20 lakh for service providers in a financial year — these are the standard thresholds under Section 22 of the CGST Act

You supply goods or services inter-state regardless of turnover — Section 24(i) makes registration mandatory from the very first inter-state transaction

You sell on e-commerce platforms such as Amazon, Flipkart, Meesho, Myntra, Swiggy, or any other marketplace — mandatory under Section 24(ix) without any turnover threshold

You are an e-commerce operator (a platform that collects payment on behalf of third-party sellers) — mandatory registration and TCS deduction obligations apply

You make reverse-charge mechanism (RCM) purchases from unregistered suppliers — registration is mandatory if you are a regular recipient subject to RCM

You are a Casual Taxable Person conducting temporary business activities in a state where you have no fixed establishment — mandatory before the first supply

You are a Non-Resident Taxable Person making any taxable supply in India — mandatory registration with advance deposit of estimated tax

You issue Input Service Distributor (ISD) invoices — separate ISD registration required alongside regular registration

You want to claim input tax credit on your purchases, pass on GST-compliant invoices to B2B corporate clients, or participate in government procurement portals (GeM) that require a GSTIN

You operate in special-category states (Jammu & Kashmir, Himachal Pradesh, Uttarakhand, the North-Eastern states, Sikkim, Mizoram): the applicable threshold is ₹20 lakh for goods and ₹10 lakh for services

You supply through an agent — both the principal and the agent may have separate registration obligations

Your business imports services from overseas suppliers — even below the turnover threshold, you may have RCM payment obligations that require registration

When registration may not be immediately necessary

Aggregate turnover is genuinely below ₹40 lakh (goods) or ₹20 lakh (services) threshold, all your supplies are intra-state, and none of the mandatory registration categories under Section 24 apply — in this narrow scenario registration is optional

Exclusive suppliers of GST-exempt goods or services (e.g., fresh unprocessed agricultural produce, educational services to students below higher-education level, certain healthcare services) have no registration obligation because they have no taxable supplies

Pure RCM recipients who have no taxable outward supplies — if you pay tax entirely under reverse charge and make no taxable outward supplies, registration is not mandated in some interpretations, but this is fact-specific and must be confirmed by a CA

Very small local retailers or sole proprietors who never supply inter-state, are not on any e-commerce platform, have entirely B2C customers who do not require tax invoices, and whose turnover is genuinely below threshold — in this specific scenario, voluntary registration adds compliance cost without proportionate commercial benefit

Businesses that have wound down or are in the process of voluntary cancellation and whose GSTIN is to be surrendered — rather than maintaining an active but non-compliant GSTIN, orderly cancellation via REG-16 is the correct path

Important caveat: these exclusions are narrow, fact-specific, and carry risk if applied loosely. Unregistered supplies that later prove taxable attract back-tax, interest at 18% per annum, and penalty equal to 100% of the tax amount. Always confirm with a CA before concluding you are outside the registration net.

Structure Comparison

GST registration categories — comparing Regular, Composition, and Voluntary registration

FeatureRegular GST RegistrationComposition SchemeCasual Taxable Person (CTP)Non-Resident Taxable Person (NRTP)Voluntary Registration (below threshold)
EligibilityAny taxable person above threshold or in a mandatory category under Section 24Aggregate turnover ≤₹1.5 crore (₹75L for special-category states); ≤₹50L for service-only compositionPerson with occasional taxable transactions in a state where they have no fixed place of businessPerson with no fixed place of business or residence in India making taxable supplies hereAny business below threshold that voluntarily opts to register
Inter-state supply permittedYes — unlimited, charged as IGSTNo — restricted to intra-state supply onlyOnly within the registered state for the period of temporary operationsYes — IGST applies to inter-state supplies in IndiaTechnically yes, but a below-threshold business supplying inter-state becomes mandatorily required to register anyway
Input tax credit (ITC) availableYes — full ITC on all eligible inward suppliesNo — ITC cannot be claimed by composition dealersYes — ITC available on inward supplies during the registration periodYes — ITC on inward supplies for the period of registrationYes — full ITC on eligible inward supplies
Tax invoice issuanceYes — mandatory for all taxable supplies above ₹200 to registered personsNo — only Bill of Supply (no GST component charged to customer)Yes — issues tax invoices with GST during the registration periodYes — issues tax invoices with IGST (typically)Yes — same as regular taxable person
Returns requiredGSTR-1 (monthly/quarterly) + GSTR-3B (monthly/quarterly); GSTR-9 annuallyCMP-08 quarterly + GSTR-4 annuallyREG-01 before commencement; final return after registration endsREG-01 before commencement; GSTR-5 monthly; final GSTR-5 within 7 days of expiryGSTR-1 + GSTR-3B (same as regular); GSTR-9 annually
Tax rate payableStandard GST rates (5%, 18%, and a demerit/luxury rate of 40%, following the September 2025 GST rate rationalisation) on taxable value of supply1% of turnover (traders), 5% (restaurants/eateries), 6% (other service providers) — paid on gross turnover, no ITC nettingEstimated tax deposited in advance; refund of excess after final returnEstimated IGST deposited in advance; refund of excess after GSTR-5Standard GST rates — same as regular
E-commerce operators permittedYes — can supply through any marketplaceNo — composition dealers cannot supply through e-commerce platforms (express bar under Sec 10(2)(d))May sell through platforms but CTP status must be disclosedCan supply in India; marketplace facilitation is possible but structurally complexYes — same as regular; but if on e-commerce, registration becomes mandatory anyway
Registration validityPermanent until cancelled or surrenderedPermanent (subject to annual renewal of option)90 days (extendable by 90 days on application before expiry)90 days (extendable before expiry; total period cannot be extended indefinitely)Permanent until cancelled or surrendered
Advance tax deposit requiredNo — pay taxes only on actual returnsNoYes — estimated tax liability for the registration period must be deposited at the time of registrationYes — estimated IGST liability for the period must be deposited at registrationNo
Best suited forBusinesses with significant input purchases; B2B supply; inter-state transactions; e-commerce; any corporate-client-facing businessSmall local retailers, eateries, and service providers with low input costs, intra-state B2C customer base, and turnover below ₹1.5 croreExhibition sellers, project-based contractors, event organizers working temporarily in a new stateForeign businesses doing short-term trade shows, demonstrations, or temporary supply arrangements in IndiaStartups and small businesses below threshold who need GST invoices for corporate clients or wish to claim ITC on capital expenditure

The Composition Scheme is not automatically cheaper — it depends on the ratio of your input tax to output tax. A business with significant GST-paid purchases may pay less net tax as a regular registrant than as a composition dealer paying 1–6% on gross turnover with no ITC offset. Always model both scenarios with actual purchase data before selecting. Switching from composition to regular scheme requires filing Form CMP-04 and may trigger ITC reversal obligations on goods held in stock at the time of switching.

How it works
#Stage & What PNPC DoesCA Advice Portals Never GiveTimeline
1Pre-Registration Advisory — Eligibility, threshold, category, and scheme analysisWe ask what portals never ask: Is any supply inter-state? Are you on an e-commerce platform? Do you have multiple business locations across states? Are you a CTP or NRTP? What is your mix of goods vs services? Do you import services? Are your clients primarily B2B or B2C? Do you have significant input purchases on which ITC would be valuable? These answers determine whether registration is mandatory or optional, which category applies (regular, composition, CTP, NRTP, ISD), in which states you need registrations, and whether a voluntary registration below threshold is commercially justified. Getting this assessment wrong means corrective action later — at penalty risk.Day 1 — no-obligation advisory call
2GSTIN Eligibility and Multi-State Jurisdiction MappingFor businesses with offices, warehouses, or sales activities in multiple states, every state of operation requires a separate GST registration with its own GSTIN, return cycle, and officer jurisdiction. PNPC maps every taxable supply to the correct state of supply under the IGST place-of-supply rules before REG-01 is filed. We have seen businesses register only in their home state and face show-cause notices for unregistered inter-state supply 18 months later — with demands covering back-tax, 18% interest, and 100% penalty on the tax amount.Day 1–2 — jurisdiction map prepared before any form is filed
3Composition vs Regular Scheme ModellingFor businesses below the composition threshold (₹1.5 crore for traders), we run an actual arithmetic comparison using your purchase invoices and expected turnover — not a theoretical one. We calculate net GST payable under both regimes, model the commercial impact of not being able to issue tax invoices under composition (lost B2B clients who need ITC), and assess the inter-state restriction. The result of this modelling is a written recommendation — not just a 'tick the box' selection on a web form.Day 2 — written scheme recommendation provided before filing
4Document Preparation — Complete, verified, error-free packageDocument errors are the single largest cause of REG-01 rejection and officer queries. The business constitution must match exactly between the PAN, Aadhaar, incorporation certificate, and all supporting documents. Address proof must not be older than 2 months at the date of submission — not at the date of collection. Where premises are rented, both the lease/rental agreement and a No Objection Certificate (NOC) from the owner are required — a lease alone is not accepted by many GST officers. For companies and LLPs, the Board resolution authorising the signatory must be specifically worded for GST purposes. PNPC verifies every document against the GST portal's requirements before submission.Day 2–4 — documents verified against pre-filing checklist
5Aadhaar Authentication or Biometric VerificationFrom 2023, the GST portal offers Aadhaar-based authentication to fast-track registration. If Aadhaar authentication is completed successfully, the application is deemed approved after the specified period without officer intervention. Aadhaar must be linked to an active mobile number — OTP is sent to the registered mobile. For applicants where Aadhaar authentication is not possible (foreign nationals, NRIs with foreign mobile, or individuals who opt out), biometric verification at a GST Seva Kendra is the alternative — this adds time. PNPC advises on the optimal path based on your specific circumstances.Day 3–4 — authentication facilitated alongside document submission
6REG-01 Filing and ARN GenerationPNPC files the application with precise category classification, correct business activity description (using NIC/GSTN approved business codes), accurate HSN/SAC codes pre-selected for your principal supplies, and the correct authorised signatory details. These choices affect which return form applies (GSTR-1 monthly vs QRMP quarterly), the e-invoice applicability threshold that applies to your registration, and the officer jurisdiction for correspondence. A generic online portal submits whatever you select — often the wrong category or an incorrect HSN code that creates future compliance complications.Day 4–5 — ARN generated immediately on successful submission
7ARN Tracking and Officer Query (REG-03) ResponseThe GST officer may raise a REG-03 query within 7 working days of ARN generation (or within 7 working days of Aadhaar authentication if that route is used). The response via REG-04 must be filed within 7 working days of the REG-03 — failure to respond results in automatic rejection via REG-05, and a fresh REG-01 must be filed. PNPC monitors ARN status daily through the GST portal and responds to any REG-03 within 24 hours of receipt — with a substantive, officer-grade response, not a generic upload. Our REG-04 responses are drafted to close the query in a single round.Day 7–15 — monitored daily; query response within 24 hours if raised
8Physical Verification Coordination (if ordered)In certain cases — particularly for new business addresses, high-risk categories, or officer discretion — the GST officer may order a physical inspection of the premises under Rule 25 read with Form GST REG-30. PNPC coordinates the inspection: prepares the premises documentation package, briefs you on what to display and which records to keep available, and accompanies the verification officer (where permitted) or remains on call throughout. Unfacilitated physical verifications are a common point of failure for applicants who are unrepresented.Within 30 days of ARN if ordered — PNPC coordinates proactively
9GSTIN Receipt, Portal Access, and HSN/SAC Code MappingOn receipt of the GSTIN via Form REG-06 (the Registration Certificate), PNPC activates the GST portal for filing, sets up access for your authorised staff, and prepares a comprehensive HSN/SAC code map for every product or service line in your business. HSN code disclosure is mandatory on invoices — 4 digits for turnover up to ₹5 crore, 6 digits for ₹5–50 crore, 8 digits for above ₹50 crore. Incorrect HSN codes cause e-invoice rejections, GSTR-1 errors, and ITC disputes for your customers. Getting this right from Day 1 is substantially easier than correcting it retroactively.Day 15–20 from filing — typically 7–15 working days for complete applications
10ITC-01 for Opening Stock (if applicable)Section 18(1)(a) allows a newly registered person to claim ITC on goods held in stock on the day immediately before the effective date of registration, provided those goods are intended for taxable supplies. This claim must be filed in Form ITC-01 within 30 days of the date of registration. PNPC reviews your purchase invoices and stock position on the registration date and files ITC-01 within the mandatory window — this is a time-limited benefit that cannot be claimed retroactively once the 30-day window closes.Within 30 days of GSTIN — filed by PNPC as part of post-registration onboarding
11Return Calendar, First GSTR-1 and GSTR-3B SetupYour first GSTR-1 and GSTR-3B are typically due within 30–45 days of registration. PNPC sets up your accounting for GST compliance from the first invoice — configuring GST rate codes, ITC eligibility classifications, reverse charge identification, and place-of-supply coding. We review your first month's purchases against GSTR-2B to establish the ITC matching discipline from Month 1. ITC mismatches between GSTR-2B (what your suppliers report) and what you claim are the most common trigger for GST notices. Setting up the reconciliation process from Day 1 prevents them from accumulating.Month 1 of registration — PNPC onboards you proactively before first return due date
12E-Invoice Registration and IRP Setup (if applicable)E-invoicing under Rule 48(4) is mandatory for registered persons whose aggregate turnover in any preceding financial year from 2017-18 onwards exceeds the current applicable threshold. For businesses crossing that threshold, every B2B invoice must be uploaded to the Invoice Registration Portal (IRP) to obtain an IRN (Invoice Reference Number) and QR code before the invoice is issued. PNPC registers your entity on the IRP, configures your accounting or billing software for e-invoice generation, and ensures your first B2B invoice after the threshold is e-invoice compliant. Non-compliant invoices give no ITC to recipients and attract penalties.Before first B2B invoice is issued if threshold applies — coordinated at registration stage
13Additional State RegistrationsFor businesses requiring registration in multiple states, PNPC handles each state's REG-01 application separately — with state-specific address proof, state-specific officer correspondence, and appropriate IGST vs CGST+SGST classification for cross-state transactions. Each additional state registration is a parallel engagement track with its own ARN, officer jurisdiction, and return obligations. Multi-state registration management includes a consolidated compliance calendar covering all GSTINs.In parallel with home-state registration where required — typically 7–15 working days per state
14Casual Taxable Person (CTP) or Non-Resident Taxable Person (NRTP) RegistrationCTP and NRTP registrations have specific requirements beyond standard REG-01: advance tax deposit based on estimated liability, 90-day validity period, a requirement to provide the registration number of the home-state entity (for CTPs), and for NRTPs, an Indian resident authorised representative must be appointed and their details filed. PNPC handles the advance deposit calculation, bank challan generation, and complete filing. CTP/NRTP registrations are rarely handled correctly by generic portals — the advance deposit calculation and the validity extension application (filed before the 90-day period ends) require expert management.Before first supply in the new state — advance deposit and filing within 5 working days of engagement
15Post-Registration Compliance Handover and Annual Health CheckAt the end of each financial year, PNPC conducts a GST health check: reviewing all GSTR-1 filings against books, all GSTR-3B filings for ITC claimed vs ITC in GSTR-2B, ITC reversal obligations (Rule 42, Rule 43, and Section 17(5) blocked credits), and GSTR-9 annual return preparation. This health check prevents small errors from compounding into audit triggers. For businesses whose turnover crosses the e-invoice threshold or the GSTR-9C reconciliation statement threshold mid-year, PNPC proactively communicates the new obligation before the first missed deadline.March–June every year — annual health check covering all GSTINs

Realistic timeline: GSTIN in 7–15 working days from complete document submission for standard applications. Applications requiring physical verification extend to up to 30 days. CTP/NRTP registrations must be complete before the first supply — advance planning of at least 7–10 working days is essential. PNPC has a near-100% first-application success rate because document verification and pre-filing review occur before submission, not after rejection.

Document Checklist
For Proprietorship

PAN Card of the proprietor — self-attested copy; name must match Aadhaar exactly as printed

Aadhaar Card of the proprietor — must be linked to an active mobile number for OTP-based e-Sign; if Aadhaar is not linked to mobile, biometric verification at GST Seva Kendra is required

Passport-size photograph of the proprietor (JPEG, less than 100 KB)

Proof of principal place of business — electricity bill, municipal tax receipt, or property tax receipt in the name of the owner (not older than 2 months from date of application); OR if rented/leased: registered/notarised lease deed plus a No Objection Certificate (NOC) from the owner

Bank account proof — cancelled cheque leaf displaying the account number and IFSC code, OR bank statement not older than 3 months

Business name registration proof where the proprietorship trades under a registered name — Shop & Establishment Certificate, or MSME/Udyam Registration Certificate

For Partnership Firm (Registered or Unregistered)

PAN Card of the partnership firm

PAN Card and Aadhaar Card of each partner who is an authorised signatory

Original or certified copy of Partnership Deed — signed, on stamp paper of the applicable denomination for the state

Proof of principal place of business — electricity bill or property tax receipt in the firm's name (≤2 months old); OR lease deed plus NOC from owner if premises are rented

Bank account proof of the firm — cancelled cheque or bank statement showing firm's account number and IFSC

Passport-size photographs of all partners listed in the registration application

Registration certificate from the Registrar of Firms if the firm is registered (not mandatory for GST, but recommended to include)

For Private Limited Company / One Person Company

PAN Card of the company

Certificate of Incorporation issued by MCA — including CIN

Memorandum of Association (MoA) and Articles of Association (AoA)

Board Resolution authorising the specific director or employee as the authorised signatory for GST registration purposes — on company letterhead, signed by authorised directors, bearing company seal where applicable

PAN Card and Aadhaar Card of the authorised signatory director

Passport-size photograph of the authorised signatory

Proof of registered office / principal place of business — electricity bill or property tax receipt ≤2 months in the company's name; OR if rented: lease agreement plus NOC from the landlord

Bank account proof of the company — cancelled cheque or recent bank statement

Class 3 Digital Signature Certificate (DSC) of the authorised signatory — companies and LLPs cannot use Aadhaar OTP for GST filing; a valid Class 3 DSC in the signatory's PAN is mandatory

For Limited Liability Partnership (LLP)

PAN Card of the LLP

Certificate of Incorporation / Registration Certificate from MCA including LLPIN

LLP Agreement — notarised or certified true copy

PAN Card and Aadhaar of the designated partner authorised as GST signatory

Consent letter / resolution from designated partners authorising the signatory

Passport-size photograph of the authorised designated partner

Proof of registered office — electricity bill or property tax ≤2 months in LLP's name; or lease deed plus NOC

Bank account proof of the LLP

Class 3 DSC of the authorised designated partner

For Casual Taxable Person (CTP) — Additional Requirements

All documents required for the relevant business constitution (as above)

Estimated value of taxable supplies to be made during the period of temporary operations in the state

Estimated tax liability for the registration period — this amount must be deposited as advance tax at the time of registration (calculated on estimated IGST/CGST+SGST basis)

Home-state GSTIN / registration number where the business is permanently registered

Proof of temporary business address in the state — exhibition hall allotment letter, event space booking confirmation, or temporary lease/sublease agreement

If premises are a shared or co-working space: No Objection from the space operator and proof of the operator's own address establishment

For Non-Resident Taxable Person (NRTP) — Additional Requirements

Passport copy of the foreign national applicant (if individual) or company registration documents from the home country (if entity)

Tax identification number / VAT number from the country of establishment

Details of the Indian resident authorised representative — their PAN, Aadhaar, address proof, and a signed Letter of Authorisation / Power of Attorney in prescribed format

Estimated value of taxable supplies to be made in India during the registration period

Advance tax deposit — estimated IGST liability must be deposited before the GSTIN is issued

Bank account in India (or facility to make online NEFT/RTGS payment of advance tax to the GST electronic cash ledger)

If through an Indian agent: consignment agent registration may also be required — PNPC maps the correct structure for cross-border arrangements

For Additional Place of Business / Multiple States

Proof of additional premises for each location — electricity bill or lease deed + NOC, ≤2 months old at submission

If the additional place is in the same state: REG-14 amendment to the existing GSTIN is filed within 15 days of establishing the additional place

If the additional place is in a different state: a completely separate REG-01 application for that state is mandatory — it is not an amendment to the home-state GSTIN

For multi-state registrations: separate documents for each state's principal place of business, separate bank proof if different accounts per state, and a map of inter-state vs intra-state supply flows

Where a Head Office is the Input Service Distributor (ISD): separate ISD registration required in addition to the regular state-level registrations; ISD invoices can only distribute credits for services — not goods

Ongoing obligations
PhaseTriggered ByPNPC CA GuidanceRisk If Ignored
Registration (Day 1–20)Business formation, threshold crossing, or mandatory category trigger (inter-state supply, e-commerce, CTP, NRTP)Complete pre-registration advisory: eligibility assessment, scheme selection (regular vs composition), jurisdiction mapping, category classification, CTP/NRTP advance deposit calculation, and document verification before REG-01 is filed.Wrong scheme elected; missed mandatory category; registration in wrong state; ITC blocked from first invoice; penalty for late registration (₹10,000 or tax evaded, whichever is higher).
Aadhaar Authentication / Physical VerificationGST portal requirement at registration stageFacilitates Aadhaar OTP authentication for individuals/proprietors; coordinates biometric verification for those without Aadhaar-mobile linkage; prepares premises documentation for physical inspections ordered under REG-30.Authentication failure causes application to stall; physical verification without preparation often results in adverse officer report and cancellation of application.
Opening Stock ITC Claim — ITC-01Effective date of registration (30-day window from registration date)Reviews stock invoices dated before registration date; identifies eligible ITC on goods (not services or capital goods); files ITC-01 within the 30-day mandatory window.Missing the 30-day window is a permanent loss — there is no extension, condonation, or appeal mechanism for late ITC-01.
First Return Month30–45 days after GSTIN issuedFirst GSTR-1 and GSTR-3B setup; invoice classification into taxable, exempt, nil-rated, and non-GST categories; GSTR-2B review and ITC matching; HSN summary preparation; e-invoice compliance check if threshold applies.ITC mismatches in Month 1 create a compounding error that is difficult to unwind. Errors in the first GSTR-1 propagate into customers' GSTR-2B and trigger disputes from the first month.
Ongoing Return Compliance (Monthly / Quarterly)Perpetual — monthly (if above QRMP threshold) or quarterly (if turnover ≤₹5 crore under QRMP)GSTR-1 filed by 11th of the following month (monthly) or 13th of the month after quarter (QRMP); GSTR-3B filed by 20th (monthly) or 22nd/24th depending on state (quarterly); GSTR-2B reconciled each period; QRMP eligibility reviewed at every ₹5 crore threshold check in the preceding year.Late fee: ₹50/day per return (₹20/day for nil returns) up to ₹10,000 per return. Interest at 18% per annum on delayed tax payment, calculated from the due date to the actual date of payment.
QRMP Opt-In / Opt-Out EvaluationAnnual — October each year for the April–September option; April each year for the following yearThe Quarterly Return Monthly Payment (QRMP) scheme allows taxpayers with turnover ≤₹5 crore to file GSTR-1 and GSTR-3B quarterly while paying tax monthly via Form PMT-06. PNPC evaluates QRMP eligibility at the prescribed opt-in/opt-out windows and advises based on your filing complexity and payment cash flow.Missed QRMP opt-in means remaining on monthly filing even if turnover qualifies for quarterly; missed opt-out means quarterly filing continues even if turnover has crossed ₹5 crore threshold.
Annual Return (GSTR-9)31 December following the close of each financial year (extended in some years by notification)GSTR-9 reconciles annual outward supply totals, ITC claimed, and tax paid against the monthly GSTR-1 and GSTR-3B data. PNPC reviews all differences before filing — mismatches discovered at this stage indicate return errors to be corrected via amendment. GSTR-9C reconciliation statement and audit requirement applies to taxpayers above the notified turnover threshold.Unfiled GSTR-9 triggers system-generated notices and blocks GSTIN in good standing. Unreconciled differences between GSTR-1/3B and books invite officer scrutiny and audit.
E-Invoice Threshold CrossingAggregate turnover crossing the e-invoice mandatory threshold in any year from 2017-18Registration on Invoice Registration Portal (IRP); integration of billing software with IRP API or GSTN's e-invoice offline tool; configuration of QR code printing on invoices; blocking of manual invoice series (JSON upload is mandatory for B2B invoices above the threshold).Invoices issued without IRN are treated as invalid under Rule 48(5) — the recipient cannot claim ITC, and the supplier is liable to penalty of ₹10,000 per invoice or the tax amount, whichever is higher.
GST Audit / Scrutiny / AssessmentOfficer selection (risk-based or random), turnover-based audit trigger, or specific ITC mismatchRepresentation before GST officer; audit trail documentation; substantiation of ITC claims with purchase invoices and GSTR-2B reconciliation; computation of admitted liability and interest where due; drafting of response to Audit Memorandum or Scrutiny Notice (ADN/ASMT-10).Unrepresented assessees routinely concede valid ITC claims, accept inflated demands, or miss the response deadline — which leads to best-judgement assessment under Section 62 that can be overturned only by filing a belated return within 30 days.
Amendment of Registration (REG-14)Change in business name, address, nature of business, authorised signatory, or addition of new branch within the same stateREG-14 filed within 15 days of change. Some amendments (core fields: legal name, principal place of business) require officer approval; non-core fields are auto-approved. PNPC prepares the supporting documents, drafts the amendment application, and follows up on officer approval for core-field changes.Operating under changed circumstances without amendment creates a discrepancy between the registration details and actual operations — grounds for officer scrutiny. Delay beyond 15 days constitutes technical non-compliance.
New State RegistrationOpening of branch, warehouse, or commencement of supply activities in a new stateFresh REG-01 in the new state with state-specific documents. PNPC assesses whether the new-state activity constitutes a 'fixed establishment' requiring registration or a mere inter-state supply that can be invoiced from the home-state GSTIN with IGST. Incorrect assessment leads to show-cause notices.Operating from a new state without registration constitutes unregistered inter-state supply — penalty equal to the applicable tax plus 100% of the tax amount. Officer jurisdiction in each state is independent — a notice from Karnataka GSTIN cannot be responded to through a Tamil Nadu advocate without formal proxy.
Cancellation of Registration (REG-16 / Officer-Initiated)Business cessation, fall below threshold, or compliance defaultVoluntary cancellation via REG-16 after filing of the final return covering all outstanding periods. ITC reversal computed on closing stock and capital goods as per Section 18(4). Electronic cash ledger balance refunded. Bank account unlinked. PNPC coordinates the complete exit sequence to prevent ongoing late fees on a dormant but active GSTIN.An active GSTIN after business cessation continues to accrue late fees for unfiled returns — ₹50/day per return — even if no business activity occurs. A dormant GSTIN can accumulate ₹20,000 in late fees per year on nil returns alone. Revocation of officer-initiated cancellation requires filing all pending returns and paying all accumulated dues.
Frequently asked
What is the GSTIN and what does each digit in the 15-character number mean?

GSTIN stands for Goods and Services Tax Identification Number. It is a 15-character alphanumeric code structured as follows: the first 2 digits are the state code (e.g., 33 = Tamil Nadu, 29 = Karnataka, 36 = Telangana, 07 = Delhi, 27 = Maharashtra); the next 10 characters are your PAN (the PAN of the proprietor for proprietorships, or the entity PAN for companies, LLPs, firms); the 13th character is an entity number distinguishing multiple registrations in the same state under the same PAN (starts at 1 for the first registration, 2 for the second, etc.); the 14th character is always 'Z'; and the 15th is a check-sum digit. Every GSTIN you are issued must appear on every tax invoice you issue from that state's operations.

Practitioner noteThe state code in the GSTIN determines which state's GST officer has jurisdiction over your account — and this matters for audits, refunds, advance rulings, and officer correspondence. Businesses with multiple state registrations regularly quote the wrong GSTIN on inter-state invoices — this creates a mismatch in the recipient's GSTR-2B, blocks their ITC, and triggers disputes that can take months to resolve. PNPC sets up explicit state-GSTIN mapping during the registration onboarding so every invoice is issued from the correct GSTIN.
I run an online store selling only within Tamil Nadu. My turnover is ₹35 lakh. Am I required to register for GST?

If your aggregate turnover is below ₹40 lakh for goods suppliers, all your supplies are intra-state, and you are not selling through an e-commerce operator — registration is not mandatory. However, if you are listed on any marketplace (Amazon, Flipkart, Meesho, Myntra, or any other platform that is an 'e-commerce operator' under Section 2(45) of the CGST Act) — GST registration is mandatory regardless of turnover under Section 24(ix). The turnover threshold exemption expressly does not apply to persons who supply goods or services through an e-commerce operator.

Practitioner noteThis is one of the most common misunderstandings we encounter. A seller with ₹6 lakh annual revenue on Amazon asks why they need to register. The answer is Section 24(ix) — there is no threshold exemption for e-commerce suppliers. We have seen marketplace seller accounts restricted or suspended because the GST-mandatory field was left blank or an invalid GSTIN was provided. Even if you are below the threshold, once you are on a marketplace, register.
Can I have a single GST registration covering my business operations in Chennai and Bangalore?

No. GST is strictly state-specific. Tamil Nadu operations require a Tamil Nadu GSTIN (state code 33); Karnataka operations require a Karnataka GSTIN (state code 29). These are separate registrations on gst.gov.in, with separate return obligations (GSTR-1, GSTR-3B), separate electronic credit ledgers, separate input tax credit pools, and separate officer jurisdictions. You cannot consolidate them under a single registration. The Input Service Distributor (ISD) mechanism exists for distributing common input service credits across states, but even ISD requires an ISD registration in each state.

Practitioner noteWe meet business owners regularly who assumed a single registration covers all-India operations. The consequences are serious: invoices issued from the wrong GSTIN (e.g., using the Tamil Nadu GSTIN for Karnataka supplies) means IGST should have been charged on inter-state supplies but CGST+SGST was charged instead — a classification error that generates credit note and corrected invoice obligations. Customers' GSTR-2B shows credit in the wrong state. Multi-state mapping is always the first output of our pre-registration advisory.
What is the difference between CGST, SGST, IGST, and UTGST on my invoices?

For intra-state supply (both supplier and customer in the same state): the applicable GST is split equally between Central GST (CGST) and State GST (SGST) — each at half the applicable rate. An 18% GST supply shows 9% CGST + 9% SGST. For inter-state supply (supplier and customer in different states): the full rate is charged as a single Integrated GST (IGST). A 18% inter-state supply shows 18% IGST. The destination state receives its share through an inter-government settlement. UTGST (Union Territory GST) replaces SGST when the supply is intra-UT (within a Union Territory without legislature such as Chandigarh, Dadra & Nagar Haveli, or Lakshadweep). The place of supply rules under the IGST Act determine whether a supply is intra-state or inter-state. Note: following the September 2025 GST rate rationalisation, the standard slab structure is now 5%, 18%, and a 40% demerit/luxury rate — the earlier 12% and 28% slabs were merged or reassigned across these bands, so the applicable rate on any given supply should always be checked against the current notified rate schedule rather than assumed from the old four-slab structure.

Practitioner noteCharging CGST+SGST on an inter-state invoice (or IGST on an intra-state one) is a classification error. It requires a credit note and a corrected invoice from the supplier, and the recipient's ITC is affected — their GSTR-2B will show the wrong type of credit that cannot be used against their output tax liability. First-time registrants frequently make this error because the distinction seems administrative but has real tax consequences. PNPC sets up your invoice format with correct tax-type selection logic before you issue your first invoice.
What happens if I cross the GST threshold mid-year? When exactly must I register?

Under Section 22(1) of the CGST Act, registration must be applied for within 30 days of becoming liable to register — i.e., within 30 days of the day your aggregate turnover exceeded the applicable threshold. The 'effective date' of registration (for ITC purposes) relates back to the date the liability arose, not the date the GSTIN was actually issued. Supplies made after the liability date must be included in your first return, even if the GSTIN came later. Late registration — after the 30-day window — attracts a penalty of ₹10,000 or an amount equal to the tax evaded, whichever is higher, under Section 122.

Practitioner noteThe aggregate turnover test is on a PAN-India basis, not per-state. If you have a business in Tamil Nadu generating ₹15 lakh and another entity or vertical under the same PAN in Karnataka generating ₹28 lakh, your aggregate is ₹43 lakh — above the ₹40 lakh goods threshold — even though neither individual state unit has crossed it independently. We regularly find clients in this situation who believed they were safely below the threshold.
Is GST TDS applicable to every payment I receive? My government client says they will deduct GST TDS from my invoice.

GST TDS under Section 51 of the CGST Act applies only to specified deductors — Central Government, State Governments, local authorities, and government entities notified for this purpose (such as public sector undertakings and government-controlled companies) — when the total contract value or the value of supply in a single contract exceeds ₹2.5 lakh. The TDS rate is 2% (1% CGST + 1% SGST for intra-state, or 2% IGST for inter-state). The deductor files GSTR-7, and the corresponding credit appears in your GSTR-2B as a usable input against your output tax. GST TDS by private sector companies or individuals is not part of the GST law — private companies do not have GST TDS obligations.

Practitioner noteWe encounter this regularly: suppliers who believe all B2B payments attract GST TDS (confusing it with Income Tax TDS under sections 194C, 194J, etc.). Income Tax TDS and GST TDS are entirely separate legal frameworks with different deductors, different rates, different forms, and different credit mechanisms. A private buyer who deducts 'GST TDS' from your payment is creating a problem — the deducted amount has no mechanism to appear in your GST credit ledger and cannot be claimed as GST credit.
What is the Composition Scheme and who should consider it?

The Composition Scheme under Section 10 of the CGST Act allows small businesses with aggregate turnover up to ₹1.5 crore (₹75 lakh for certain special-category states) to pay GST at a flat percentage of turnover — 1% for goods traders, 5% for restaurants, 6% for service providers — without tracking input-output at the transaction level. Composition dealers cannot charge GST on their invoices (only Bill of Supply), cannot claim input tax credit on purchases, cannot make inter-state supplies, and cannot sell through e-commerce operators. A separate scheme for service providers allows composition up to ₹50 lakh turnover at 6% under the CGST (Composition Levy) Amendment. The scheme significantly reduces compliance burden — CMP-08 quarterly statement and GSTR-4 annually, versus monthly GSTR-1 and GSTR-3B for regular filers.

Practitioner noteThe composition scheme is not automatically cheaper — it depends on the arithmetic of your specific business. A trader paying 1% composition tax on ₹80 lakh turnover pays ₹80,000 in GST. Under the regular scheme, if the applicable rate on output is 5% and the trader has ₹60 lakh in GST-paid purchases at the applicable notified rate (5% or 18% under the post-September-2025 rate structure), the net GST payable under regular scheme might be significantly lower. We run this comparison with actual invoice data before recommending a scheme. The other major constraint is the B2B client issue: your customers cannot claim ITC on a Bill of Supply — if they need tax invoices, composition eliminates you as a viable vendor.
My GST application was rejected. What must I do now — and can I challenge the rejection?

Rejection of a GST registration application (via Form REG-05) closes that specific application permanently — it cannot be revived or appealed as a registration matter. You must file a fresh REG-01 application. Before reapplying, the reason for rejection must be understood — common causes include: failure to respond to REG-03 query within the 7-working-day window; PAN name not matching Aadhaar exactly; address proof older than 2 months at submission; document mismatch (e.g., partnership deed not matching the partner details in the application); or a failed physical verification. The rejection reason is communicated in REG-05. Reapplying without correcting the root cause will produce the same outcome.

Practitioner noteMost rejections we handle as remediation cases were caused by one of three preventable issues: PAN-Aadhaar name mismatch (even a single character or middle name difference triggers rejection), address proof that was barely over the 2-month limit at the time of submission (not the time of collection), or a missed REG-03 response because the applicant was unaware the query had been raised. Our pre-filing verification process catches all three before submission. We have seen clients waste 4–6 weeks on a rejected application that a pre-filing check would have prevented.
Can I claim input tax credit on purchases I made before receiving my GSTIN?

Yes — with specific conditions. Section 18(1)(a) allows a newly registered person to claim ITC on stocks of goods (not services) held on the date immediately before the effective date of registration, provided those goods are intended for making taxable supplies. The ITC claim must be filed in Form ITC-01 within 30 days of the grant of registration. ITC on services received before registration is not available as opening stock credit. ITC on capital goods purchased before registration is also not claimable under Section 18(1)(a). The claim requires purchase invoices less than 12 months old at the time of filing ITC-01.

Practitioner noteThis is a valuable but strictly time-limited benefit. Businesses that register even a few weeks after crossing the threshold lose ITC on all purchase invoices that are not covered in the ITC-01 filing. Missing the 30-day window is a permanent loss — no extension or condonation is available. We make ITC-01 filing an automatic first step in our post-registration onboarding, conducted within the first week after GSTIN receipt.
Does a proprietor or partnership firm need a Digital Signature Certificate (DSC) to register for GST?

A DSC is not mandatory for proprietorships and partnership firms — they can authenticate the REG-01 application using Aadhaar-based e-Sign (OTP sent to the Aadhaar-registered mobile number) or Electronic Verification Code (EVC) through net banking or mobile banking. However, companies and LLPs are required to use a Class 3 DSC of the authorised signatory for all GST filings including REG-01 — Aadhaar-based OTP authentication is not available to corporate entities for this purpose. A company or LLP that does not have a Class 3 DSC of its authorised signatory will be blocked at the final submission stage.

Practitioner noteFor NRI directors or foreign national directors who are the authorised signatories for an Indian company, Aadhaar is unavailable. They require a Class 3 DSC obtained through PAN-based video KYC — a process different from the standard Aadhaar-OTP DSC route. The DSC must be in the individual's own PAN (not the company PAN). PNPC coordinates DSC procurement for all categories — Indian residents, NRI directors, and foreign nationals — as an integrated part of the GST registration engagement.
What is the difference between 'aggregate turnover' and 'taxable turnover' for threshold purposes?

Aggregate turnover (for determining registration threshold and Composition Scheme eligibility) is defined under Section 2(6) of the CGST Act to include: all taxable supplies, all exempt supplies, all exports of goods and services, and all inter-state supplies made by a person under the same PAN across all states and business verticals — calculated in aggregate. It excludes: the GST tax component, inward supplies on which reverse charge is paid by the recipient, and the value of goods supplied on behalf of principals by agents. Taxable turnover (relevant for computing actual tax) excludes exempt supplies. The threshold test uses aggregate turnover — a business supplying only exempt goods and services may still need to register if their aggregate exceeds the threshold AND they fall into a mandatory category.

Practitioner noteThis distinction catches businesses that supply a mix of taxable and exempt goods. A hotel that primarily provides exempt healthcare services to in-house patients but also supplies food and beverages (taxable) must include both in the aggregate turnover computation. The exempt-only exclusion from registration does not apply if the aggregate — including exempt supplies — is above the threshold and any mandatory category is triggered. We frequently see clients who have correctly excluded their exempt supplies from tax computation but wrongly excluded them from the threshold test.
How long does GST registration take, and what typically slows it down?

The standard timeline from complete, verified document submission to GSTIN receipt is 7–15 working days for applications that complete Aadhaar authentication successfully. If Aadhaar authentication is not done, the officer has 30 days to process the application (or order physical verification). Key factors that extend the timeline: (a) Officer query via REG-03 — must be answered via REG-04 within 7 working days or the application is rejected; (b) Physical verification of premises ordered under REG-30 — adds up to 30 days; (c) Aadhaar authentication failure because the mobile number is not linked to Aadhaar; (d) PAN-Aadhaar name mismatch requiring correction before resubmission; (e) Address proof issues detected by the officer (date, name mismatch, missing NOC); (f) Constitution mismatch between the application and supporting documents.

Practitioner noteOfficer scrutiny patterns vary by jurisdiction and business category. Certain trade classifications consistently attract REG-03 queries from specific district offices in Chennai, Hyderabad, and Bangalore. PNPC's active portfolio across all three cities means we anticipate these queries and prepare response documentation in advance — rather than reacting after the query is raised. Applications prepared by us rarely receive REG-03 queries on document matters, because we pre-empt the officer's standard checklist.
What happens to my GST registration if I stop filing returns?

Failure to file returns for 6 consecutive months (for monthly filers) or 3 consecutive quarters (for quarterly filers) triggers GST officer action under Section 29(2) of the CGST Act. The officer issues a Show Cause Notice via Form REG-17, requiring the registrant to show why registration should not be cancelled. If no response is filed or the response is unsatisfactory, the GSTIN is suspended via Form REG-31 and then cancelled via Form REG-19. A cancelled GSTIN cannot issue valid tax invoices — any invoice issued under a cancelled GSTIN gives no ITC to the recipient, creating compliance exposure for both the supplier and the customer. Revocation of cancellation under Section 30 requires filing all pending returns and paying all outstanding tax, interest, and late fees.

Practitioner noteGSTIN suspension is particularly dangerous because it may not be visible to the business immediately — the system notification goes to the portal, which many businesses only check when filing returns. In the interim, the business continues issuing invoices, customers' GSTR-2B does not reflect these invoices, and ITC disputes multiply. The backlog of pending returns and dues required for revocation can be very large if suspension went undetected for months. Active monitoring of GSTIN status is part of PNPC's ongoing compliance retainer service.
My business is based in Dubai. Do I need GST registration in India if I supply services to Indian clients?

The answer depends on the nature of the supply, whether it is B2B or B2C, and whether the Dubai entity has a 'fixed establishment' in India. For B2B services where the Indian recipient is a registered taxable person: the Indian recipient typically pays tax under reverse charge (Section 5(3) of the IGST Act read with relevant notifications) — the Dubai entity need not register in India for those specific supplies. For B2C supplies to unregistered Indian consumers: the place of supply is India, the UAE entity is making taxable supplies here, and as a non-resident taxable person making taxable supplies in India without a fixed establishment, registration as NRTP under Section 24 may be required. Any Dubai entity with a permanent establishment, branch, or liaison office in India has additional obligations. This is a specialist area requiring combined IGST, FEMA, and possibly DTAA analysis.

Practitioner notePNPC's presence in both India and Dubai allows us to advise cross-border structures coherently — identifying whether to structure the India supply as a service export from the UAE entity (possibly zero-rated in the UAE), as a PE-taxable domestic supply in India, or through an Indian subsidiary or branch. Each structure has different GST, corporate tax, and FEMA implications. We also assist UAE entities applying for PAN and setting up the Indian NRTP registration with the advance tax deposit mechanism.
What is the QRMP scheme and should I opt for it?

QRMP — Quarterly Return Monthly Payment — allows GST-registered taxpayers with aggregate annual turnover up to ₹5 crore in the preceding financial year to file GSTR-1 and GSTR-3B on a quarterly basis instead of monthly, while continuing to pay tax monthly through Form PMT-06. The opt-in or opt-out window opens on the GST portal — taxpayers choose between monthly and quarterly at prescribed intervals. Under QRMP, GSTR-1 for Q1 (April–June) is due by 13 July; GSTR-3B for Q1 is due by 22nd or 24th July (depending on the state classification). Monthly tax payment is done by the 25th of each month within the quarter.

Practitioner noteQRMP is beneficial if your business has stable monthly transactions and you want to reduce return filing frequency. But it introduces a planning requirement: you must estimate and pay tax monthly via PMT-06 even though the return is quarterly — underpayment results in interest at 18% per annum on the shortfall. Businesses with volatile monthly revenues sometimes find monthly filing easier because it ties the payment to actual return-verified figures. We assess QRMP vs monthly filing at every annual evaluation and recommend based on your cash flow and filing complexity.
What are HSN codes and SAC codes? Why do they matter for GST invoices?

HSN stands for Harmonised System of Nomenclature — the international classification code for goods, adopted in India for GST purposes. SAC stands for Services Accounting Code — the equivalent classification for services under GST. HSN/SAC codes must be declared on every tax invoice: 4-digit codes for businesses with annual turnover up to ₹5 crore; 6-digit codes for ₹5 crore to ₹50 crore turnover; 8-digit codes for turnover above ₹50 crore. HSN/SAC codes are also mandatory in the GSTR-1 HSN summary table and in e-invoices. Incorrect HSN codes cause e-invoice rejection at the IRP, create mismatches in the recipient's GSTR-2B, and may indicate a wrong tax rate is being applied — because the GST rate applicable to a supply is determined by its HSN/SAC classification.

Practitioner noteIncorrect HSN classification is one of the most common errors in first-time registrant invoices. Businesses often use a broad or generic HSN code because they are unsure of the precise classification — this can result in applying the wrong notified rate (for example, 5% instead of 18%, or vice versa) under the current rate schedule, creating either underpayment (demand notices) or overpayment (ITC disputes at the customer end). PNPC prepares a complete HSN/SAC code map for your product and service lines as part of the registration engagement — and updates it when you add new products or services or when a rate notification changes the applicable slab.
What is an e-invoice and when does it become mandatory for my business?

E-invoicing under Rule 48(4) of the CGST Rules requires eligible taxpayers to generate B2B tax invoices exclusively through the Invoice Registration Portal (IRP), which validates the invoice and returns a unique Invoice Reference Number (IRN) and a digitally signed QR code. The invoice is then shared with the buyer. E-invoicing is mandatory for B2B supplies, B2G supplies (to government entities), and export transactions for businesses whose aggregate turnover exceeds the notified threshold in any preceding financial year from 2017-18 onwards. The obligation applies on an ongoing basis once the threshold is crossed — even if turnover subsequently falls below it. B2C supplies (to end consumers) are not e-invoice mandated, but a dynamic QR code on B2C invoices above ₹500 is required for taxpayers above a separate specified turnover.

Practitioner noteThe e-invoice obligation sneaks up on businesses because it depends on any prior year's turnover, not the current year. A business that had a high-turnover year and then retracted still has the e-invoice obligation. Invoices issued without an IRN are not valid under Rule 48(5) — the recipient cannot claim ITC on them, and the supplier is liable for a penalty of ₹10,000 per invoice or the tax amount, whichever is greater. This is a high-consequence obligation that must be set up before the first B2B invoice is issued after crossing the threshold.
What is blocked credit under Section 17(5) of the CGST Act? Can I claim ITC on my company car or staff meals?

Section 17(5) of the CGST Act specifies categories of inward supplies on which input tax credit is expressly blocked, regardless of whether they are used for business. Blocked credit categories include: (a) motor vehicles (cars, motorcycles) used for transportation of persons, except for businesses in the business of supplying such vehicles, transportation services, or driver training; (b) food and beverages, outdoor catering, beauty treatment, health services, cosmetic and plastic surgery (unless the taxable person is in the business of providing these services or using them for a mandatory statutory obligation); (c) club memberships, health club facilities; (d) rent-a-cab services, life insurance, and health insurance (except where obligatory under law or for employees working in a qualifying business); (e) works contract services for construction of immovable property; (f) goods or services for construction of immovable property on own account. The rule is comprehensive and frequently misunderstood.

Practitioner noteThis question comes up at every accounting setup discussion. The instinct to claim ITC on every purchase invoice is understandable but incorrect — Section 17(5) blocks are hard blocks, not soft rules. Claiming ITC on a staff canteen, company car, or health club membership creates an ITC reversal demand with interest at 18% per annum from the month of claim. We build the blocked-credit classification directly into the chart of accounts setup so that blocked-credit purchases are never inadvertently included in the ITC claim.
What is Reverse Charge Mechanism (RCM) under GST and how does it affect my registration?

Under the Reverse Charge Mechanism (RCM), the liability to pay GST shifts from the supplier to the recipient of the supply. Section 9(3) of the CGST Act specifies notified categories of goods and services that attract RCM — including legal services by individual advocates to business entities, security services by non-corporate entities, goods transport agency (GTA) services where the GTA does not pay GST, and several others. Section 9(4) previously made RCM payable by registered persons on all purchases from unregistered suppliers — this provision has been substantially modified; currently, it applies to specific notified categories. A person who is required to pay RCM but has no taxable outward supplies may still need to register — RCM payment does not require the person to be registered if they are below threshold, but in practice, most businesses receiving RCM-covered supplies also have taxable outward supplies and are already registered. RCM paid appears as a credit in the Electronic Cash Ledger and can be used for output tax payment.

Practitioner noteRCM is a common source of under-compliance. Businesses do not realise that when they hire a security firm that is not GST-registered, or receive GTA services from a transporter who has not paid GST, they are the person liable to pay the GST. That tax must be paid in cash — not from ITC — and then separately claimed as ITC in the next filing period. Missing RCM creates a tax liability plus 18% interest from the due date. We map all RCM-applicable purchases during the accounting setup phase so nothing falls through the cracks.
What is the Input Service Distributor (ISD) mechanism and when do I need a separate ISD registration?

An Input Service Distributor (ISD) is an office of a registered person that receives tax invoices for services used by its branches and distributes the input tax credit of those services to the branches using ISD invoices in prescribed proportions. A typical use case: a company's head office in Chennai receives invoices for IT software, legal advisory, or insurance that benefits all its branches in multiple states. The head office (registered as ISD in Tamil Nadu) receives the ITC and distributes proportionate amounts to the Tamil Nadu GSTIN, Karnataka GSTIN, and so on. ISD is a separate registration from the regular registration — it requires a separate REG-01 specifying the ISD status, and a separate GSTR-6 return. ISD cannot distribute credit for goods — only services.

Practitioner noteThe ISD mechanism is underutilised by multi-state businesses because setting it up adds a compliance layer. But for companies with substantial shared-service costs (HO software, legal advisory, insurance), not using ISD means the HO absorbs all the ITC while branches have excess output tax and no corresponding credit — leading to a real cash-flow disadvantage. We evaluate ISD necessity during the multi-state registration mapping exercise and set it up where the math justifies it.
What is the GST Annual Return (GSTR-9) and who must file it?

GSTR-9 is the annual return required to be filed by every registered taxable person (other than composition dealers, casual taxable persons, Input Service Distributors, non-resident taxable persons, and persons paying TDS/TCS under the Act). GSTR-9 consolidates the entire year's outward supply data, ITC claimed, ITC reversed, and tax paid, reconciling it against the monthly GSTR-1 and GSTR-3B data. It is due by 31 December following the close of the financial year (though the due date has been extended in prior years by notification). For taxpayers with turnover above a notified threshold, GSTR-9C — a reconciliation statement (previously audited by a CA, now self-certified) — is also required. Voluntary filing of GSTR-9 is permitted even for taxpayers below the threshold who are otherwise exempt from filing.

Practitioner noteGSTR-9 is not a mere formality — it is the reconciliation that surface-reveals every error made in monthly returns. Differences between GSTR-1/3B data and GSTR-9 entries indicate either monthly filing errors (undeclared supply, wrong ITC, missed reversals) or book-keeping gaps. Identified differences need to be either explained or corrected through amendments before GSTR-9 is filed. The GSTR-9 preparation process at PNPC includes a full-year reconciliation of all returns against books — it is the most comprehensive quality check on a year's GST compliance.
How is the place of supply determined for services, and why does it affect which GST type I charge?

The place of supply for services determines whether a transaction is intra-state (CGST+SGST) or inter-state (IGST). The IGST Act, Sections 12 and 13, contains extensive rules. The general rule for B2B supply of services is that the place of supply is the location of the recipient (i.e., where the registered business is located). The general rule for B2C supply of services is the location of the supplier. Specific rules override the general rule for certain categories — immovable property-related services (place = location of the property), restaurant and catering services (place = where the service is performed), performance-based services such as events or training (place = where the event is held), transportation of goods (place = destination of goods for IGST purposes), passenger transport (place = where the journey originates).

Practitioner notePlace of supply errors are among the most expensive to correct because they affect both the supplier's return and the customer's ITC. A consultant in Chennai who provides advisory services to a Hyderabad client should charge IGST (inter-state supply, place = location of Hyderabad recipient). If they charge CGST+SGST instead, the Hyderabad client has Tamil Nadu CGST+SGST credit that cannot be used against their Telangana SGST liability. Correction requires credit notes and amended returns in both GST jurisdictions. Place-of-supply training is included in every PNPC GST registration onboarding.
Can I switch from the Composition Scheme to Regular Registration? What are the implications?

Yes. A composition dealer can withdraw from the scheme by filing Form CMP-04 with effect from the beginning of the financial year (for voluntary withdrawal) or mandatorily exit when their aggregate turnover exceeds the composition threshold in the current year. On exit from composition: (a) the dealer becomes liable to file GSTR-1 and GSTR-3B from the effective date; (b) they must file Form ITC-01 to claim ITC on goods (inputs, semi-finished goods, finished goods) held in stock on the date of transition — the same 30-day window applies; (c) they must compute ITC reversal for capital goods that attracted credit under the composition period at a notional basis; (d) their customers, who previously received only a Bill of Supply, will now receive tax invoices and can claim ITC from the transition date. The switch-over date must be managed carefully to avoid a billing gap.

Practitioner noteThe transition from composition to regular scheme is more complex than it appears. The ITC-01 claim on transition-day stock can be significant — if a trader has ₹40 lakh of goods-in-stock on the transition date and the GST on those goods was 18%, the ITC claim is ₹7.2 lakh. Missing ITC-01 loses this permanently. We manage composition-to-regular transitions as a structured engagement: computing the benefit of the ITC-01 claim, managing the first regular-scheme returns to avoid errors, and communicating the change to key suppliers and customers.
What is the process and timeline for cancellation of my GST registration when I close my business?

Voluntary cancellation of a GSTIN is done by filing Form REG-16 on the GST portal. The application must include: the reason for cancellation, the date from which cancellation is sought, the details of stock (if any) held on the cancellation date, and particulars of the final return to be filed. After filing REG-16, the final return (Form GSTR-10 — the Final Return) must be filed within 3 months of the cancellation order or the date specified in the cancellation order. The final return accounts for all outstanding tax on closing stock and capital goods (Section 18(4) ITC reversal). Upon satisfactory processing, the GSTIN is cancelled via Form REG-19. Any balance in the Electronic Cash Ledger after final payment can be refunded.

Practitioner noteThe most common error in cancellation is continuing to use the GSTIN after the requested cancellation date but before the formal REG-19 order — which creates invoices under a technically cancelled GSTIN. The other pitfall is not filing GSTR-10 within the 3-month window: a late GSTR-10 attracts a late fee and may result in the GSTIN being marked as 'non-compliant' in the portal, creating issues for vendors who previously transacted with you. We manage the full cancellation sequence — final return preparation, ITC reversal calculation, GSTR-10 filing, and ledger balance refund application — as an integrated process.
What is the process for obtaining a GST refund — for exports or excess ITC?

GST refunds are available in several scenarios: (a) Export of goods without payment of IGST (and refund of IGST paid on inputs via the accumulated ITC mechanism); (b) Export of goods with payment of IGST (refund of the IGST paid on the export itself); (c) Inverted duty structure — where the GST rate on inputs is higher than on output, creating an ITC accumulation that cannot be offset; (d) Excess cash payment; (e) Refund on deemed exports; (f) CTP/NRTP advance deposit refund. The refund application is filed in Form RFD-01 on the GST portal, supported by documents prescribed for the specific category. The officer must process within 60 days; provisional refund of 90% of claimed amount is available for export refunds within 7 working days. Delay beyond 60 days attracts interest at 6% per annum payable by the government.

Practitioner noteExport refunds under the inverted duty structure are frequently under-claimed because businesses are unaware that ITC accumulated on inputs (e.g., 18% GST on services) can be refunded when output GST is at a lower rate (e.g., 5%). The refund procedure involves certificate requirements, CA attestation in certain cases, and bank realisation certificates (BRC) for foreign exchange. PNPC handles export refund applications as a dedicated practice area — identifying refundable amounts, preparing RFD-01 with full documentation, and following up through provisional refund to final sanctioned refund.
What is the Letter of Undertaking (LUT) for exports and how does it work?

A Letter of Undertaking (LUT) under Rule 96A of the CGST Rules allows a registered person to export goods and services without paying IGST on the export, by furnishing an undertaking that the export proceeds will be received in foreign currency within the prescribed time (currently 3 months for goods exports from the date of invoice, 1 year for services). Without an LUT, the exporter must pay IGST on the export and then claim a refund — which locks up working capital. With an LUT, the export is zero-rated without any upfront tax outflow. LUT must be filed online on the GST portal in Form RFD-11 for each financial year — it is year-specific and must be renewed annually. Failure to renew before the start of the new financial year means exports in April require IGST payment until the LUT for the new year is accepted.

Practitioner noteLUT renewal is one of those 31 March to 1 April transition items that businesses frequently miss. An exporter who exports in the first week of April without a renewed LUT is technically required to pay IGST on those exports — resulting in either a refund claim (working capital blockage) or interest on unpaid tax. PNPC adds LUT renewal to every exporter's February compliance calendar so it is filed and approved before 1 April. Exporters who have had a GSTIN suspension or compliance default in the prior year may not be eligible for LUT — they must export with IGST payment and claim refund, adding 60–90 days to cash recovery.
What are the penalties for operating without GST registration when it was required?

Operating without GST registration when it is mandatorily required is treated as a tax evasion offence under Section 122 of the CGST Act. The applicable penalty is 100% of the tax amount payable in respect of the unregistered period (minimum ₹10,000). This penalty is separate from the back-tax liability itself and from the interest at 18% per annum on the outstanding tax from the date it was due. In serious cases — specifically where the evaded amount exceeds specified thresholds — the offence can attract prosecution under Section 132, including imprisonment for up to 5 years. Even in non-prosecution cases, the total exposure (back-tax + interest + penalty) for a business that operated without registration for 2 years can equal approximately 3–3.5 years' worth of the annual tax amount.

Practitioner noteThe most practical risk we communicate to businesses that come to us after operating unregistered is the day-count. Interest at 18% per annum running from the date liability arose means every month of delay approximately increases exposure by 1.5% of the outstanding tax. A business with ₹50 lakh in unregistered tax liability accrues approximately ₹75,000 in additional interest every month. Early voluntary registration with a full disclosure of prior-period liability — combined with timely payment of back-tax, interest, and reduced penalty through the voluntary compliance route — is always superior to waiting for an officer-initiated investigation.
What is the Goods and Services Tax Network (GSTN) and what is its role?

The Goods and Services Tax Network (GSTN) is the private not-for-profit company (incorporated under Section 8 of the Companies Act) that provides the shared IT infrastructure underpinning the entire GST compliance system — the gst.gov.in portal. GSTN manages taxpayer registration, return filing, tax payment processing, invoice matching (GSTR-2B generation), e-invoice validation at the Invoice Registration Portal (IRP), and the analytics layer that flags mismatches for officer action. GSTN does not administer the tax law — that is the role of the Central Board of Indirect Taxes and Customs (CBIC) and State Commercial Tax departments. GSTN manages the technical infrastructure through which administration is exercised.

Practitioner noteUnderstanding the GSTN architecture is relevant because GSTN portal errors — server timeouts, interface bugs, import failures — are common, especially around return filing deadlines. GSTN does not grant extensions; extensions require a CBIC notification. Portal errors that prevent timely filing are mitigated by maintaining a log of attempted filing (with screenshots), which is accepted by many officers as evidence of reasonable cause when penalties are contested. PNPC files all returns at least 3 days before the deadline to avoid last-minute portal load issues.
My business sells both goods and services. Which GST threshold applies — ₹40 lakh or ₹20 lakh?

When a business supplies both goods and services, the applicable threshold depends on the composition of the supply. If the aggregate turnover includes supply of goods, the higher ₹40 lakh threshold applies for the goods component under the CGST Act — but the ₹20 lakh threshold applies to service supply. In practice, the CBIC has clarified that for a business making composite or mixed supplies, the applicable threshold is based on the category that attracts the lower threshold — but this area has specific notification-based nuances. The safest interpretation for a mixed goods-and-services business in most states is to apply the ₹20 lakh threshold to the services portion and the ₹40 lakh threshold to goods — and if aggregate is above either threshold for the relevant category, to register.

Practitioner noteThis is genuinely one of the less clear areas of the statute, particularly for businesses that have a blended supply model. We do not advise clients to rely on the higher ₹40 lakh goods threshold to defer registration when they have significant service revenue — the risk of a later finding that the lower threshold applied is too high given the penalty consequences. Our advice is almost always: if you are close to either threshold, register. The compliance cost of maintaining a GSTIN is far lower than the back-tax, interest, and penalty exposure of registering too late.
What is the difference between a suspended GSTIN and a cancelled GSTIN?

A suspended GSTIN means the registration has been temporarily frozen, typically pending cancellation proceedings. During suspension (governed by Rule 21A), the taxpayer cannot make taxable supplies, cannot issue valid tax invoices, and cannot claim ITC. The suspension is indicated by Form GST REG-31. A cancelled GSTIN means the registration has been formally terminated — either by the officer via REG-19 or by the taxpayer's voluntary application. After cancellation, the GSTIN is inactive and cannot be revived except through a revocation application under Section 30 (possible only for officer-initiated cancellations, not for voluntary cancellations). Suppliers whose GSTIN is suspended or cancelled cannot give valid ITC to their customers — invoices issued by suspended or cancelled registrations are invalid for credit purposes.

Practitioner noteThe danger of suspension is the stealth factor: the suspended entity may not be immediately aware of the suspension (system notifications go to the portal dashboard), continues issuing invoices, and the customers' GSTR-2B does not reflect those invoices. The ITC dispute then surfaces when the customer's accountant reconciles GSTR-2B in the following month. We actively monitor GSTIN status for all clients on our compliance retainer and flag any suspension within 24 hours of it appearing on the portal.
Is GST registration mandatory for a freelancer providing IT services with turnover of ₹18 lakh?

For a freelancer providing services (including IT, consulting, design, or software services) whose aggregate annual turnover is below ₹20 lakh (the service provider threshold in most states), and all supplies are to Indian clients on an intra-state basis, GST registration is not mandatory under Section 22. However: if the freelancer supplies services to clients in other states (even occasionally) — Section 24(i) makes registration mandatory regardless of turnover; if the freelancer receives payment from overseas clients for services rendered to persons located outside India — these may qualify as exports of services, which are zero-rated under Section 16 of the IGST Act, but to benefit from zero-rating (either with or without payment of IGST), the freelancer must be registered and hold an LUT; if the freelancer works through platforms like Upwork or Fiverr that are classified as e-commerce operators — the Section 24(ix) mandatory registration for e-commerce suppliers may apply.

Practitioner noteFreelancers who supply to international clients should almost always register — voluntarily if below threshold — because export of services is zero-rated (no GST on output), and registration allows claiming ITC on their purchases (computer equipment, software subscriptions, office expenses) and potentially claiming export refunds. The ITC benefit on capital expenditure alone often outweighs the compliance cost of maintaining a GSTIN for a software freelancer with significant equipment purchases.
How does the GST registration process work for a company director who is a foreign national or an NRI?

Foreign national directors and NRI directors of Indian companies can be the GST authorised signatory, but the process has specific requirements. As mentioned, Aadhaar is not available to foreign nationals, so the Class 3 DSC must be obtained through PAN-based identity verification. PAN must first be applied for and issued (foreign nationals and NRIs apply through NSDL/UTIITSL using Form 49AA for foreign nationals). Once PAN is held, DSC is obtained through a Certifying Authority using video KYC. The foreign national director must also hold a Director Identification Number (DIN) from MCA. PNPC coordinates the PAN application, DSC procurement via video KYC, and DIN verification as a pre-step to the GST registration for companies with foreign national or NRI authorised signatories.

Practitioner noteThe most common mistake is attempting to file GST registration for a company whose authorised signatory does not yet have a DSC in their PAN — the application reaches the final submission screen and fails. For foreign national signatories, the video KYC-based DSC process typically takes 5–7 working days. We add this to the project timeline for all new company incorporations with foreign director involvement, so the GST registration is not delayed after the Certificate of Incorporation is received.
What are the new obligations that arise when my business crosses the e-invoice mandatory threshold mid-year?

When a business crosses the aggregate turnover threshold that makes e-invoicing mandatory (as notified by the CBIC, applicable from the date their turnover in any year from 2017-18 onwards crosses that level), several obligations activate simultaneously: (a) All B2B tax invoices, B2B credit notes, and B2B debit notes must now be generated by uploading to the IRP before the invoice is issued to the customer; (b) Each invoice received an IRN (Invoice Reference Number) and a digitally signed QR code that must be printed on the invoice; (c) Manual invoice series must be discontinued for B2B transactions — the IRP-validated JSON becomes the authoritative record; (d) B2C invoices above ₹500 require a dynamic QR code (separate from the IRN QR) for eligible taxpayers; (e) The e-invoice data auto-populates GSTR-1 — reducing the manual data entry in returns but requiring reconciliation of the auto-populated data.

Practitioner noteThe transition from non-e-invoice to e-invoice compliance is a billing system event, not just a tax event. If your billing software does not have IRP integration, you need to configure an e-invoice generation tool (GSTN's offline utility, a third-party e-invoicing software, or an API integration). The transition date requires clean cutover — any B2B invoice issued without an IRN after the obligation date is invalid and attracts the ₹10,000 per invoice penalty. PNPC evaluates your billing setup and configures the IRP integration as a turnover-milestone service — we monitor turnover thresholds in our retainer clients' books and flag the transition 60 days before it is likely to be crossed.
What records must I maintain as a GST-registered person, and for how long?

Section 35 and Rules 56–58 of the CGST Act/Rules require every registered person to maintain records at the principal place of business (and each additional place of business) in the form of: accounts of production or manufacture; inward supply accounts; outward supply accounts; stock of goods; input tax credit availed; output tax payable and paid; and goods imported or exported. These records must be maintained in physical or electronic form for 72 months (6 years) from the due date of filing the annual return for that year, or for any period for which an appeal or revision is pending — whichever is later. Electronic records must be preserved in a manner that allows access and retrieval by officers.

Practitioner noteThe 72-month retention requirement is frequently under-appreciated. A business that closes in 2026 must retain all GST records from 2020-21 onwards until at least December 2027 (72 months from the due date of GSTR-9 for 2020-21). Disposing of records earlier creates risk in the event of a show-cause notice or audit that covers prior years. Cloud accounting systems (Tally Prime, Zoho Books, QuickBooks India) retain records indefinitely by default, making this requirement easy to comply with if the accounting system is maintained — but paper-based businesses must be explicitly advised on physical record retention.
What is the difference between zero-rated supply and nil-rated supply under GST?

These are two distinct legal categories that are commonly confused: Zero-rated supply refers to supplies covered under Section 16 of the IGST Act — specifically, exports of goods and services, and supplies to Special Economic Zones (SEZs) for authorised operations. The rate of tax on these supplies is 0%, and crucially, the supplier is entitled to either claim a refund of ITC accumulated on inputs used for zero-rated supplies (export without IGST payment under LUT) or claim a refund of IGST paid on the supply (export with IGST payment). This is the beneficial zero-rating that makes exporting commercially viable. Nil-rated supply refers to supplies listed in Schedule I or exempt notifications where the GST rate is 0% — but unlike zero-rated supplies, the supplier cannot claim ITC on inputs used for nil-rated supplies (the ITC must be reversed under Rule 42/43).

Practitioner noteA software company that exports services and also provides some services at 0% under a CBIC exemption notification needs to treat these differently: the export revenue is zero-rated (ITC refundable), while the exempted domestic revenue is nil-rated (ITC to be reversed). Conflating these two creates both an under-claim of export ITC refunds and an over-claim of ITC on nil-rated supplies — two separate audit risks. We map this classification carefully for every client with mixed-rate supply profiles.
What is a Show Cause Notice (SCN) under GST and what should I do if I receive one?

A Show Cause Notice (SCN) in GST is a formal notice from the GST officer requiring the taxpayer to show cause why a specified action (demand, penalty, cancellation, interest, or other adverse finding) should not be taken. GST SCNs are issued under various provisions: Section 61 for scrutiny of returns (Form ASMT-10); Section 73 for non-fraud demand (3-year period); Section 74 for fraud demand (5-year period); Section 29 for cancellation of registration (Form REG-17). The response must be filed within the time specified in the SCN — typically 30 days for demand notices, 7 days for REG-17 cancellation notices, and 30 days for ASMT-10 scrutiny. Failure to respond within the specified time gives the officer power to pass an ex-parte order — an order based solely on the officer's findings, without the taxpayer's version — which is binding and enforceable.

Practitioner noteThe single most important advice on SCNs: do not ignore and do not respond without professional guidance. GST SCN responses are quasi-judicial submissions that establish the taxpayer's legal position — errors or admissions made in a first response are on record and constrain the arguments available in appeals. PNPC drafts responses with a defence-in-depth approach: contesting the legal basis, providing factual clarifications, and reserving appeal grounds even where some partial concession is made. We have represented taxpayers in SCN responses across all three cities.
How does PNPC handle GST registration for a new startup that has not yet generated any revenue?

A startup with zero current revenue may still need to register for GST for strategic reasons: to issue GST-compliant invoices to corporate clients who require them (even for the first sale), to claim ITC on capital expenditure such as laptops, servers, office furniture, and professional services, to sell through e-commerce platforms (mandatory regardless of turnover), or to demonstrate regulatory readiness to investors who examine compliance status during due diligence. Voluntary registration at startup stage is available under Section 25(3) of the CGST Act. The process, documents, and timeline are the same as for mandatory registration. The obligations that arise — return filing, ITC matching, compliance calendar — begin immediately from the registration date.

Practitioner noteWe recommend startup registration not just on compliance grounds but on cash-flow grounds. A startup that makes ₹5 lakh in capital purchases (servers, software, equipment) in the first 6 months at 18% GST has ₹90,000 in ITC sitting with the government — recoverable against future output tax. Deferring registration means losing this ITC (since ITC-01 on opening stock covers goods, not equipment used). Early registration also means the startup's GST registration date is 2026, not 2027 — building a compliance track record that matters when banks, investors, and large corporate clients request GST history.
What is the GSTR-2B and how is it different from GSTR-2A?

GSTR-2B is the static, auto-drafted input tax credit statement generated on a fixed date each period, reflecting all inward supply information filed by a taxpayer's suppliers in their GSTR-1 up to the cut-off date. It is generated on the 14th of the following month (for monthly filers). GSTR-2B is the definitive statement for ITC claims — Section 16(2)(aa) restricts ITC claims to what appears in GSTR-2B, meaning a buyer cannot claim ITC on a supplier's invoice until the supplier has filed that invoice in their GSTR-1 and it appears in the buyer's GSTR-2B. GSTR-2A is the dynamic, auto-populated draft that updates in real time as suppliers file returns — it is not used for ITC claims but provides a running view of inward supply data. GSTR-2A can be used for reconciliation purposes but GSTR-2B is the operative document for ITC entitlement.

Practitioner noteThe GSTR-2B restriction on ITC is one of the most significant changes in recent GST compliance — a buyer can no longer freely claim ITC on all purchase invoices; they can only claim what appears in their GSTR-2B. This means a supplier's filing default directly harms the buyer's ITC. We advise clients to use GSTR-2B as the primary ITC checklist each month and to follow up with non-compliant suppliers before the GSTR-3B due date — because claiming ITC not in GSTR-2B triggers a system-generated mismatch notice. The practical implication is that you should periodically review your supplier panel's GST filing compliance.
What is the process for amending a GST registration — for example, if my business name or address changes?

Amendments to GST registration details are made by filing Form GST REG-14 on the GST portal within 15 days of the event that requires the change. The CGST Rules distinguish between core fields and non-core fields: core fields (legal name of the business, principal place of business address, addition or deletion of partners/directors, etc.) require officer approval and may take up to 15 working days; non-core fields (mobile number, email address, additional places of business, bank account details) are auto-approved on the portal without officer intervention. If the officer does not act on a core-field amendment within 15 working days, the amendment is deemed approved. Supporting documents for address changes include the new address proof (electricity bill or lease deed + NOC, ≤2 months old). Name changes require the amended incorporation certificate from MCA or relevant authority.

Practitioner noteTwo common amendment mistakes: First, businesses that move premises do not file REG-14 within the 15-day window — operating from an unregistered address constitutes non-compliance. Second, businesses that change their legal name (e.g., after conversion from LLP to Pvt Ltd) do not update their GSTIN with the new legal name — continuing to issue invoices with the old name creates an identity mismatch in recipients' books. We track amendment obligations for retainer clients and file REG-14 proactively when a change event is notified to us.
What is the TCS (Tax Collected at Source) obligation for e-commerce operators, and how does it affect the sellers on my platform?

Under Section 52 of the CGST Act, every e-commerce operator (defined as a person who owns, operates, or manages a digital or electronic facility through which suppliers make supplies) is required to collect Tax Collected at Source (TCS) at 1% (0.5% CGST + 0.5% SGST for intra-state; 1% IGST for inter-state) on the net value of taxable supplies made by sellers through the platform. The TCS must be paid by the 10th of the following month and reported in GSTR-8. The TCS deducted appears in the seller's GSTR-2B as a credit claimable against their output tax. E-commerce operators are separately required to register for GST (as operators, not just as businesses) regardless of their own turnover.

Practitioner noteThe TCS obligation applies to the e-commerce operator — not to the individual sellers. However, sellers on platforms that are subject to TCS should verify that the TCS deducted is correctly reflected in their GSTR-2B each month. Discrepancies between the TCS deducted (visible in bank statements or platform reports) and what appears in GSTR-2B indicate an operator filing error — which must be taken up with the platform, not treated as a seller-side ITC issue.
Why PNPC Global

What you get from PNPC vs filing yourself or using a generic online portal

Service DimensionOnline GST Portal / Generic Filing ServicePNPC Global — CA Firm Since 1986
Pre-Registration Eligibility AnalysisNo advisory; accepts whatever category the applicant selectsThreshold analysis, mandatory-category check (e-commerce, inter-state, CTP, NRTP), scheme selection arithmetic (composition vs regular), multi-state jurisdiction mapping — before filing
Composition vs Regular ModellingPicks the option you select; no modellingRuns actual arithmetic comparison using your purchase data and expected turnover; models the B2B-client ITC implication; provides a written scheme recommendation
Multi-State RegistrationFiles one state; leaves the rest to youMaps all states of operation; identifies where inter-state supply creates mandatory registration; files separate REG-01 in each required state; coordinates all ARN tracking in parallel
Document VerificationAccepts whatever is uploaded; rejection is your problemPre-filing verification of PAN-Aadhaar name match, address proof age (≤2 months), constitution document consistency, authorised signatory setup, DSC availability for companies/LLPs
HSN/SAC Code ClassificationGeneric codes or self-selected codes — often wrongCorrect 4-digit, 6-digit, or 8-digit HSN/SAC codes mapped to your actual product and service lines; affects tax rate, invoice compliance, e-invoice validation, and GSTR-1 accuracy
Officer Query (REG-03) ResponseApplicant left to handle alone; 7-day window is tightARN monitored daily; REG-03 query answered within 24 hours; substantive officer-grade response drafted to close the query in one round; REG-04 filed with complete supporting documents
CTP / NRTP RegistrationsComplex category — generic services rarely handle correctlyAdvance tax calculation, challan generation, Indian authorised representative appointment (for NRTPs), 90-day validity tracking, and extension filing before expiry
Post-Registration SetupApplication filed; service endsGSTIN activation, ITC-01 for opening stock, return calendar setup, HSN code map, IRP e-invoice registration (if applicable), accounting framework configuration, first-month GSTR-1 and GSTR-3B filing
Ongoing Compliance RetainerNot includedMonthly/quarterly GSTR-1 + GSTR-3B; GSTR-2B reconciliation; GSTR-9 annual return; LUT renewal annually; QRMP eligibility review; e-invoice threshold monitoring; amendment management
Cross-Border (India + UAE) ExpertiseIndia-only; no cross-border advisoryPNPC offices in Chennai and Dubai — dual-jurisdiction advisory on India-UAE structures, NRTP registrations, export-of-services zero-rating, FEMA compliance, and DTAA planning from a single CA relationship
Audit / SCN RepresentationNot availablePNPC represents clients in GST audits, scrutiny notices (ASMT-10), demand proceedings (Sections 73 and 74), and REG-17 cancellation show-cause notices across Chennai, Bangalore, and Hyderabad
Direct CA AccessChat widget or call centreDirect WhatsApp and phone access to the CA handling your account — available for questions that arise between filings, when a notice arrives, or when a business decision has GST implications

What the PNPC package includes

  1. 01

    Pre-registration advisory — threshold analysis, mandatory category identification, scheme selection (regular vs composition vs CTP/NRTP), jurisdiction mapping across all states of operation

  2. 02

    Composition-vs-regular financial model using your actual purchase invoices and projected turnover — written recommendation provided before filing

  3. 03

    Document collection checklist tailored to your business constitution — verification of PAN-Aadhaar match, address proof date, constitution document consistency, DSC availability

  4. 04

    Aadhaar authentication coordination or biometric verification facilitation for applicants without Aadhaar-mobile linkage

  5. 05

    REG-01 preparation and filing — correct category classification, business activity code, HSN/SAC codes, authorised signatory configuration, and Aadhaar authentication or DSC coordination

  6. 06

    ARN tracking with daily portal monitoring; REG-03 officer query response within 24 hours; REG-04 filing with substantive supporting documentation

  7. 07

    Physical premises verification coordination when ordered under REG-30 — documentation package and officer-visit facilitation

  8. 08

    GSTIN receipt and portal activation; HSN/SAC code map for all product and service lines; IRP e-invoice registration and billing-software integration if threshold applies

  9. 09

    ITC-01 for opening stock claim filed within the 30-day mandatory window — no time-limited benefit lost

  10. 10

    First-month GSTR-1 and GSTR-3B setup; GSTR-2B reconciliation framework established from Month 1; QRMP eligibility assessment

  11. 11

    Additional state registrations — separate applications, documents, and ARN tracking per state; ISD registration if applicable

  12. 12

    CTP and NRTP registrations — advance deposit calculation, challan, 90-day tracking, and extension filing

  13. 13

    LUT filing for exporters before 1 April each year; annual LUT renewal managed proactively

  14. 14

    Ongoing compliance retainer — GSTR-1, GSTR-3B, GSTR-9, GSTR-9C, GSTR-10 (on cancellation), GSTR-5 (for NRTPs), GSTR-6 (ISD), GSTR-7 (TDS deductors), GSTR-8 (e-commerce operators)

  15. 15

    Direct CA contact — phone and WhatsApp — for business decisions that have GST implications, notice management, and audit representation

Speak directly with a PNPC Chartered Accountant — not a form-submission portal, not a helpdesk chat, not a junior executive. A practising CA who has handled GST registrations since Day 1 of the regime, who knows your business model, your states of operation, and the compliance obligations that flow from your very first invoice. Available in Chennai, Bangalore, Hyderabad, and Dubai.

← Back to GST
Talk to a CA