How to Get, Change, or Cancel Your GSTIN: Registration Process, Documents, and Amendment Guide
Quick Summary
- GST registration is filed through Form GST REG-01 on the official GST portal. If the application is complete and documents are in order, registration is typically processed within 7 working days. If the officer raises queries in Form GST REG-03, the applicant has 7 working days to respond.
- GST registration thresholds are not a single universal rule. The practical threshold depends on whether the person supplies goods, services, or mixed supplies, and also on whether special compulsory registration provisions apply.
- PAN change and state change are not simple amendment items under GST registration. In such cases, fresh registration is generally required rather than an amendment.
- GST registration details are divided into core fields and non-core fields. Core field changes require officer approval and are generally processed within 15 working days. Non-core field changes are processed faster and in many cases auto-approved.
- If GST registration is cancelled, the registrant must file GSTR-10 (the Final Return) within 3 months from the date of cancellation. Any Input Tax Credit remaining in the Electronic Credit Ledger at the time of cancellation cannot be retained and must be reversed or paid.
- Bank account details are not mandatory at the initial application filing stage in the current portal workflow, but they must be furnished later within the prescribed timeline.
- If your GSTIN has been cancelled by an officer, revocation must be applied for in Form GST REG-21 within 30 days of the cancellation order, after clearing all pending returns and dues.
What Is GSTIN?
GSTIN, short for Goods and Services Tax Identification Number, is the unique registration number issued to every person or business registered under the GST regime in India under Section 25 of the CGST Act, 2017. It acts as the core indirect tax identity of the registered taxpayer and connects a business to GST invoices, returns, e-way bills, e-invoice systems, and Input Tax Credit chains.
Every GSTIN is PAN-linked and state-specific . A business operating in multiple states generally needs separate GST registrations for each state or union territory from which it makes taxable supplies, so one legal entity can hold multiple GSTINs under the same PAN.
For a detailed breakdown of GSTIN structure, state codes, taxpayer types, and how to verify a GST number online, see: GSTIN Number: Meaning, Format, State Codes, Search and Complete Guide.
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Who Needs a GSTIN? Registration Thresholds
GST registration liability depends on the nature of supply, the type of taxpayer, and the applicable state category. The threshold is not identical for every business.
Threshold-Based Registration
The threshold stated above does not apply uniformly. The position can differ based on whether the person supplies only goods, services, or mixed supplies; whether the business falls in a lower-threshold state category; and whether compulsory registration applies regardless of turnover.
Compulsory Registration Regardless of Threshold
Certain persons may need GST registration even if they do not cross the normal turnover threshold, including:
- Casual Taxable Persons
- Non-Resident Taxable Persons
- Persons liable under certain reverse charge provisions
- Input Service Distributors
- Persons required to deduct or collect tax at source under GST
- E-commerce operators and many persons supplying through online platforms
- Other notified categories
Voluntary Registration
Even where registration is not mandatory, businesses may choose to register voluntarily. Common reasons include dealing with B2B customers who prefer registered vendors, participating in formal supply chains, and preparing for future growth. Once registered, all compliance responsibilities follow regardless of whether the registration was mandatory or voluntary.
How to Apply for GSTIN: 8-Step Process
GST registration is applied for through Form GST REG-01 on the official GST portal. The form is filed online and does not require a visit to any tax office under normal circumstances.
Step 1: Access the GST Portal
Visit gst.gov.in and navigate to Services → Registration → New Registration. This initiates Form GST REG-01, the prescribed application form for new GST registration under Section 25 of the CGST Act, 2017.
Step 2: Complete Part A of REG-01 - Basic Details
Part A collects preliminary details including taxpayer type, state and district, legal name of the business as per PAN, PAN, email address, and mobile number. OTP verification is sent to both the registered mobile number and email address. Once the OTPs are validated, the system generates a Temporary Reference Number (TRN).
Step 3: Save the TRN
The TRN is valid for 15 days from the date of generation. It allows the applicant to save their progress and return to complete Part B. Save the TRN immediately and keep it accessible, as the application cannot be resumed without it after the session ends.
Step 4: Fill Part B of REG-01 - Detailed Registration Information
Return to the portal using the TRN and complete Part B, which covers:
- Business details and the nature of business activity
- Promoters, partners, or directors, including their PAN, identity documents, and photographs
- Authorized signatory details
- Principal place of business and address proof
- Additional places of business if applicable
- Goods and services with HSN or SAC codes
- Bank account details (optional at this stage; must be furnished later within the prescribed timeline)
Step 5: Upload Supporting Documents
Upload the required supporting documents as per the constitution of the business. Common reasons for rejection or officer queries at this stage include:
- Low-quality or illegible scanned images
- Mismatch between the business name on the PAN and the name on the lease agreement or other documents
- Insufficient proof of principal place of business
- Incomplete or unsigned authorization letters
- Missing constitution documents such as partnership deed or incorporation certificate
Step 6: Submit REG-01 Through the Applicable Digital Verification Route
REG-01 must be submitted using one of the following verification methods:
- DSC (Digital Signature Certificate): Mandatory for companies and LLPs
- EVC (Electronic Verification Code): Available for proprietorships, partnerships, and certain other entities where DSC is not mandatory
- Aadhaar-based OTP: Available for eligible categories where Aadhaar authentication is enabled on the portal
On successful submission, an Application Reference Number (ARN) is generated and sent to the registered email and mobile. The ARN confirms that REG-01 has been submitted and is now in the processing queue.
Step 7: Track Application Status and Await Processing
Track the ARN at gst.gov.in under Services → Registration → Track Application Status. If the application is complete and documents are in order, registration is typically processed within 7 working days from the date of submission. During this period, the application moves from "Pending for Processing" to either "Approved" or "Pending for Clarification."
Step 8: Respond to Officer Query or Download the Registration Certificate
Two outcomes are possible at this stage:
If the officer raises a query (Form GST REG-03)
The officer may issue a clarification notice in Form GST REG-03, requesting additional documents or information. The applicant must respond within 7 working days from the date of service of the notice by filing Form GST REG-04, attaching the requested clarifications and documents.
After a satisfactory response, the officer approves the registration and issues the GST Registration Certificate in Form GST REG-06.
If the response is unsatisfactory or the applicant fails to respond within the prescribed time, the officer may reject the application in Form GST REG-05, with written reasons for rejection. A rejected application can be re-filed after addressing the grounds of rejection.
If no query is raised and the registration is approved
The GST Registration Certificate in Form GST REG-06 is issued. It is available for download on the portal under Services → User Services → View/Download Certificates.
The registration certificate must be:
- Downloaded and preserved securely in digital and physical form
- Displayed prominently at the principal place of business under Rule 18 of the CGST Rules, 2017
- Displayed at every additional place of business
Documents Required for GST Registration
The documents required differ by the constitution of the business.
Common Documents Generally Required
- PAN of the applicant or entity
- Photograph of authorized signatory where applicable
- Proof of principal place of business
- Constitution documents of the entity
- Identity and authorization records where required
For Proprietorship
PAN of proprietor, identity proof as applicable, business premises proof, and supporting business details and declarations.
For Partnership Firm or LLP
PAN of the firm or LLP, partnership deed or LLP agreement, partner details, authorized signatory proof, and principal place of business proof.
For Company
Certificate of incorporation, company PAN, list of directors with identity documents, board resolution or authorization support, authorized signatory records, and principal place of business proof.
Proof of Principal Place of Business
| Premises Type | Acceptable Documents |
|---|---|
| Owned | Property tax receipt, electricity bill, municipal khata, ownership deed |
| Rented or leased | Rent or lease agreement (registered or unregistered), along with ownership proof of the lessor (electricity bill or property tax receipt in the lessor's name) |
| Consent arrangement | Consent letter from the consenting party, along with that party's ownership proof |
| Shared space or co-working | Relevant arrangement letter and ownership or tenancy proof for the shared space |
Bank Account Details
Bank account details are not mandatory at the initial filing stage in the current portal workflow. However, they must be furnished within the prescribed time after registration. Delay in providing bank account details can trigger a suspension notice and operational problems. Add the bank account details as early as possible after receiving the registration certificate.
GSTIN Amendment: Core vs Non-Core Fields
After receiving the GST registration, many business changes require the registration to be updated. The GST framework divides registration details into two categories - core fields and non-core fields - and the amendment process differs for each.
What Is a Core Field?
Core fields are registration details that are considered fundamental to the registration's legal identity. Changes to core fields require officer review and approval before they take effect.
Common core fields:
- Legal name of the business (where the change does not result in a PAN change)
- Principal place of business address (within the same state)
- Addition or deletion of partners, directors, or promoters
- Authorized signatory details
Processing timeline for core field amendments: The officer generally has 15 working days from the date of the amendment application to approve or raise a query. If the officer does not act within 15 working days, the amendment is deemed approved. If the officer raises a query within 15 working days, the applicant has 7 working days to respond.
What Is a Non-Core Field?
Non-core fields are details that are less fundamental to the registration's legal identity. Changes to non-core fields are processed more quickly and in many cases are auto-approved without officer intervention.
Common non-core fields:
- Trade name
- Additional places of business (within the same state)
- Nature of business activity and business details
- Goods and services traded
- Bank account details (when added after initial registration)
How to File a GST Registration Amendment
Amendment applications are filed in Form GST REG-14 on the portal under Services → Registration → Amendment of Registration (Core Fields or Non-Core Fields, depending on the change). The amendment application should ideally be filed within 15 days of any change in the registered details.
Supporting documents relevant to the change must be uploaded. For example:
- For address change: new premises proof (electricity bill, lease agreement)
- For director change: new director's identity documents and consent letter
- For signatory change: new authorized signatory's Aadhaar, PAN, and authorization letter
Changes That Cannot Be Made Through Amendment - Fresh Registration Required
The following changes cannot be processed through a REG-14 amendment because they alter the fundamental legal identity of the registration:
| Change Type | Why Amendment Is Not Possible | What to Do |
|---|---|---|
| Change in PAN | GSTIN is PAN-based identity | Cancel GSTIN and apply fresh registration |
| Change in state of registration | GST is state-specific | Apply for new GSTIN in new state |
| Change in constitution resulting in PAN change | New legal identity created | Cancel old GSTIN and register new entity |
GSTIN Cancellation: Voluntary, Suo Moto, and Post-Cancellation Obligations
GSTIN cancellation is governed by Section 29 of the CGST Act, 2017. Cancellation can happen voluntarily (by the registered person) or by the officer on their own initiative.
Voluntary Cancellation
A registered person may apply for cancellation of GSTIN in the following situations:
- Business is discontinued or closed
- Business has been transferred in full, amalgamated, demerged, or otherwise disposed of
- Change in constitution of the business where the new entity will register separately
- Turnover has fallen below the applicable threshold and continued registration is not commercially necessary
How to apply for voluntary cancellation
File Form GST REG-16 on the portal under Services → Registration → Application for Cancellation of Registration. The application should mention:
- The effective date from which cancellation is sought
- Details of stock held on the date of cancellation
- The liability to be discharged on stocks held (for ITC reversal purposes)
- Tax, interest, and penalty dues
The officer reviews the REG-16 application and, if satisfied, cancels the registration from the requested effective date and issues a cancellation order.
Suo Moto Cancellation by Officer
A tax officer may initiate cancellation proceedings in cases such as:
- Persistent non-filing of GST returns (typically 6 consecutive returns for monthly filers or 3 consecutive returns for quarterly filers)
- Business not found operating at the declared principal place of business
- Contravention of any provision of the CGST Act or Rules
- Registration obtained through fraud, wilful misstatement, or suppression of facts
- Composition taxpayer who has not filed 3 consecutive tax period returns
The suo moto cancellation process
- Officer issues Show Cause Notice in Form GST REG-17
- Registrant may respond within the prescribed period using Form GST REG-18 to show why the registration should not be cancelled
- If the officer is satisfied with the response, proceedings are dropped
- If not satisfied, the officer passes a cancellation order in Form GST REG-19
Post-Cancellation Compliance Obligations
Cancellation of GSTIN does not extinguish all compliance obligations. The following must be completed after cancellation:
GSTR-10: The Final Return (Mandatory)
Every person whose GST registration is cancelled must file GSTR-10 (the Final Return) within 3 months from the date of cancellation or the date of the cancellation order, whichever is later.
GSTR-10 is a one-time return that accounts for:
- Stock held at the time of cancellation (inputs, semi-finished goods, finished goods, capital goods)
- The ITC reversal obligation arising from that stock
- Any outstanding tax liability
If GSTR-10 is not filed within the 3-month deadline, the officer may serve a notice in Form GSTR-10A, giving the person a further 15 days to file. If the return is still not filed after the GSTR-10A notice, the officer may proceed to assess the final tax liability.
ITC Reversal Obligations at Cancellation
Any Input Tax Credit remaining in the Electronic Credit Ledger at the time of cancellation cannot be retained. The registered person must reverse ITC or pay an equivalent amount in respect of:
- Inputs held in stock
- Inputs contained in semi-finished or finished goods held in stock
- Capital goods and plant and machinery
For capital goods, the amount to be paid is the higher of:
- The ITC taken on those capital goods, reduced by 5% per quarter (or part of a quarter) for the period of use under the applicable rule, or
- The GST payable on the transaction value of those capital goods at the time of cancellation
Outstanding tax dues, interest, and applicable late fees must also be cleared at the time of or before filing GSTR-10.
Practical implication: A business that has claimed ITC on capital goods purchased recently and cancels registration early may face a significant ITC reversal. This should be factored into the decision and timing of voluntary cancellation.
Revocation of Cancellation
Where registration has been cancelled by the officer under suo moto proceedings, the registered person may apply for revocation in Form GST REG-21.
Key conditions for a revocation application
- Must be filed within 30 days of the date of the cancellation order (or within the period as extended by the Commissioner)
- All pending GST returns must be filed before applying
- All outstanding tax, interest, penalty, and late fees must be paid or arranged
The officer reviews the revocation application and may:
- Approve in Form GST REG-22, restoring the registration, or
- Reject in Form GST REG-05, with reasons
A suspended or cancelled GST registration affects invoicing rights, ITC flow to buyers, vendor onboarding with customers, and internal finance processing. Prompt action on revocation is important where registration was cancelled due to procedural defaults rather than genuine business closure.
GSTIN Structure: All 15 Digits Explained
Understanding the structure of a GSTIN is useful for quick first-level validation before using the portal. The key facts are summarised below.
| Position | Characters | Represents | Example |
|---|---|---|---|
| 1-2 | 2 | State / UT code | 27 |
| 3-12 | 10 | PAN of the taxpayer | ABCDE1234F |
| 13 | 1 | Entity number under same PAN in same state | 1 |
| 14 | 1 | Default character (generally Z) | Z |
| 15 | 1 | Check character (system-generated) | 5 |
Complete Example: 27ABCDE1234F1Z5
A GSTIN that is not 15 characters long is clearly wrong. If the PAN portion (characters 3 to 12) does not match the PAN shown in vendor documents, the inconsistency needs investigation. If the invoice claims billing from one state but the state code in the GSTIN points to a different state, check whether the correct registration is being used.
Complete GST State Code List
The first 2 digits of every GSTIN identify the state or union territory of registration.
| Code | State / Union Territory |
|---|---|
| 01 | Jammu & Kashmir |
| 02 | Himachal Pradesh |
| 03 | Punjab |
| 04 | Chandigarh |
| 05 | Uttarakhand |
| 06 | Haryana |
| 07 | Delhi |
| 08 | Rajasthan |
| 09 | Uttar Pradesh |
| 10 | Bihar |
| 11 | Sikkim |
| 12 | Arunachal Pradesh |
| 13 | Nagaland |
| 14 | Manipur |
| 15 | Mizoram |
| 16 | Tripura |
| 17 | Meghalaya |
| 18 | Assam |
| 19 | West Bengal |
| 20 | Jharkhand |
| 21 | Odisha |
| 22 | Chhattisgarh |
| 23 | Madhya Pradesh |
| 24 | Gujarat |
| 26 | Dadra & Nagar Haveli and Daman & Diu |
| 27 | Maharashtra |
| 29 | Karnataka |
| 30 | Goa |
| 31 | Lakshadweep |
| 32 | Kerala |
| 33 | Tamil Nadu |
| 34 | Puducherry |
| 35 | Andaman & Nicobar Islands |
| 36 | Telangana |
| 37 | Andhra Pradesh |
| 38 | Ladakh |
| 97 | Other Territory |
| 99 | Other Country |
A state code mismatch on an invoice is worth investigating, but it is not automatically proof of fraud. A supplier with operations in multiple states may issue invoices from the state where the supply is made, which may differ from their head office state.
Types of GST Taxpayers
Not all GSTINs belong to the same kind of taxpayer. The type affects what invoices the supplier can issue and whether the buyer can claim ITC.
The key distinction for buyers is between a Regular taxpayer and a Composition taxpayer. A Composition taxpayer cannot issue a regular tax invoice or pass GST credit to the buyer. If a vendor appears as a Composition taxpayer on the portal but submits an invoice with GST charged separately, that is a mismatch that needs immediate clarification.
How to Verify GSTIN Online - 3 Methods
Method 1: Search by GSTIN/UIN
Go to gst.gov.in → Search Taxpayer → Search by GSTIN/UIN. Enter the 15-character GSTIN, complete the captcha, and click Search. The portal returns the legal name, trade name, registration status, taxpayer type, and principal place of business.
Check that the legal name matches the invoice, the status is Active, the state code matches the billed registration, and the taxpayer type is consistent with the invoice format.
Method 2: Search by PAN
Useful when the vendor's PAN is known but not the exact GSTIN, or when you need to identify all GST registrations linked to a PAN. Go to gst.gov.in → Search Taxpayer → Search by PAN. This is especially useful for multi-state supplier checks and PAN misuse investigations.
Method 3: Verify E-Invoice IRN or QR Code
For suppliers covered under the e-invoicing mandate, QR code or IRN-based verification confirms that the invoice was reported through the IRP system. Use the GSTN e-services app or the relevant IRP verification tool to scan the QR code and compare the returned details against the physical invoice.
For detailed guidance on GSTR-2B reconciliation, supplier compliance monitoring, and ITC protection through verification, see: GST Supplier Verification for ITC Protection: GSTR-2B, Section 16, and Vendor Due Diligence Guide.
GSTIN Status Types Explained
| Status | Meaning | Practical Response |
|---|---|---|
| Active | Registration is currently live | Continue with further checks; Active does not guarantee full return compliance |
| Suspended | Registration is temporarily blocked | Pause invoice processing; investigate before proceeding |
| Cancelled | Registration is no longer live | Do not accept GST-charged invoices at face value; check cancellation date |
For detailed guidance on how status types affect ITC and supplier transactions, see: GST Supplier Verification for ITC Protection: GSTR-2B, Section 16, and Vendor Due Diligence Guide.
How to Spot a Fake GSTIN: Red Flags Checklist
Red flags on an invoice include:
- State code in the GSTIN does not match the billed registration
- Legal name returned by the portal does not match the name on the invoice
- PAN portion of the GSTIN does not match the PAN documents given by the vendor
- Portal shows the supplier as a Composition taxpayer but the invoice is a regular GST tax invoice
- Registration is suspended or cancelled at the time of supply
- Supplier appears to be in the e-invoice category but the invoice has no IRN or unreadable QR code
- Very recent registration but the supplier claims a long business history
Verification checklist before onboarding a new vendor:
- Verify GSTIN or PAN on the GST portal
- Confirm legal name matches invoice
- Confirm taxpayer type is consistent with the invoice format
- Confirm registration status is Active
- Confirm state code and address logic
- Check whether e-invoice controls apply
- Preserve verification evidence in vendor records
For a full supplier due diligence checklist, ITC protection controls, and monthly reconciliation guidance, see: GST Supplier Verification for ITC Protection: GSTR-2B, Section 16, and Vendor Due Diligence Guide.
How to Report a Fake GSTIN
If you suspect that a GST registration is fake, wrongly used, or linked to PAN misuse, take the following steps:
Step 1: Search by PAN
Start with PAN-based verification on the portal to identify all GST registrations linked to the PAN in question.
Step 2: Preserve Evidence
Keep all supporting material - supplier invoices, screenshots of verification results, email trails, onboarding documents, purchase orders, and mismatch notes from internal review.
Step 3: Use the Official Complaint or Grievance Route
Where complaint or reporting functionality is available through the GST system, use that route. Do not rely on informal channels for a compliance-sensitive matter of this nature.
Step 4: Escalate Where Needed
If identity misuse or fraud is suspected, escalate promptly through the appropriate official and legal channels. Delay allows continued misuse of the PAN or business identity and increases the difficulty of containing the damage.
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Conclusion
Getting, changing, or cancelling a GSTIN involves more than filling out a form. Registration requires the right documents, the right verification route, and timely response if the officer raises queries. Amendment requires understanding whether the change falls in a core or non-core field. Cancellation requires a final return in GSTR-10 and a clear view of ITC reversal obligations before closure. At each stage, acting within the prescribed timelines matters.
For the foundational concepts behind GSTIN - structure, state codes, taxpayer types, and how to verify a GST number online - see: GSTIN Number: Meaning, Format, State Codes, Search and Complete Guide.
For ITC protection, GSTR-2B reconciliation, and supplier compliance monitoring, see: GST Supplier Verification for ITC Protection: GSTR-2B, Section 16, and Vendor Due Diligence Guide.
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