GST Revision Online - How to Update GST Registration Details in 2026

There's an error on your GST registration certificate. Or you've moved offices. Or you've hired a new partner. Whatever the reason, if your GST records don't match reality, you have a compliance problem on your hands.

This isn't unusual. In my experience working with small businesses and first-time filers, outdated registration details cause more trouble than almost anything else in GST compliance. Tax notices, rejected refunds, mismatched invoices: most of these trace back to one thing, a registration that was never updated.

This guide covers what a GST amendment actually is, which fields you can change (and which you can't), how Form REG-14 works, the step-by-step process for core and non-core amendments, and when you need a fresh registration instead.

What is a GST amendment?

A GST amendment is the process of updating your GST registration after you've already registered, filed through Form GST REG-14 on the GST portal. Businesses use it most often for changes in address, trading name, authorised signatory, or bank account.

Amendments fall into two categories: core fields, which need an officer's approval, and non-core fields, which update automatically. Both come with the same 15-day deadline.

Note: CBIC Notification No. 18/2025, effective November 1, 2025, introduced Rule 9A and Rule 14A to speed up registration and amendments and move the whole process online, with Aadhaar authentication now mandatory for every applicant.

When do you need a GST amendment?

File one whenever the details on your original registration stop matching reality, whether that's a new address, a change in ownership, or a new signatory. You have 15 days from the date of the change to submit it.

Most businesses don't realize they're on the clock. They update their letterhead, move offices, open new bank accounts, and forget the GST portal entirely. I've seen this cause real headaches during audits, where officials compare your GSTIN certificate against your lease agreement and the two don't match.

Situations that typically call for an amendment:

• You changed your trading name or legal name (without a PAN change)

• Your business moved to a new address within the same state

• A partner or director joined or resigned

• Your authorised signatory changed

• You updated your bank account

• Your contact number or email needs correcting

• You added a new branch in the same state

Core fields vs. non-core fields

Not every field on your registration carries the same weight, and the portal treats them very differently.

Core fields need an officer's review. You file through Form GST REG-14, and the officer has 15 working days to approve or reject the change. These include:

• Legal or trading name (without a PAN change)

• Principal place of business, within the same state

• Additional business locations within the same state

• Adding or removing a promoter, partner, director, karta, or CEO

Non-core fields update the moment you submit them. No officer needs to sign off. These include:

• Bank account details (add, delete, modify)

• Authorised signatory details

• Contact details, phone and email

• Anything else outside the core list, like HSN codes or commodity descriptions

Non-core changes are genuinely simple: you submit, and it's done. Core changes take patience and the right paperwork.

Business name change

If your business name changes but your PAN stays the same, this counts as a core amendment. You'll need to upload updated business registration documents to support the change.

Principal place of business

Changing your address within the same state is a core amendment too. You'll need proof of the new address: a rent agreement, electricity bill, or property tax receipt. CBIC guidance from April 2025 dropped some of the older documentation requirements, like the landlord's PAN or Aadhaar, and clarified what actually counts as acceptable proof.

Change in promoter, partner, or director

When someone joins or leaves, the GST registration has to reflect it. You'll need the new stakeholder's ID documents. This applies to promoters, partners, the karta, a managing committee member, or the CEO.

Change of authorised signatory

This one trips people up. Adding or swapping an authorised signatory usually isn't treated as a core change, but if the primary signatory is the one changing, document it carefully anyway. Officers do sometimes scrutinize it.

Bank account details

You can add, delete, or update bank details as a non-core change. The portal checks that the PAN linked to the bank account matches the PAN on your GSTIN, so confirm that before you submit.

Contact details

Changing the mobile number or email of your authorised signatory just means filing Form GST REG-14 and verifying it online. No officer review needed.

When you need a fresh registration instead

The biggest misconception about GST amendments is assuming REG-14 fixes everything. It doesn't. Three situations call for a brand-new registration, not an amendment:

• PAN change. Your GSTIN is tied to your PAN. If your PAN changes, even from a correction at the Income Tax Department, your GSTIN becomes invalid.

• Change in business constitution. Converting a sole proprietorship into a partnership, for instance, changes your PAN by definition. Same result: new registration.

• Moving to a different state. GST registration is state-specific. Shifting from Rajasthan to Maharashtra means cancelling the Rajasthan GSTIN and registering fresh in Maharashtra. There's no workaround for this one.

Documents you'll need

What you need depends on what you're changing.

Change of principal place of business

• Rent agreement or lease deed for the new address

• Electricity or water bill (under 2 months old)

• Property tax receipt, if you own the property

• NOC from the landlord, if rented

Change of partner, director, or promoter

• PAN card of the new person

• Aadhaar card of the new person

• Photo

• Board resolution or partnership agreement, as applicable

Change of business name

• Updated business registration certificate

• Any regulatory approval for the name change, if applicable

Bank account update

• No documents needed. The system verifies through the linked PAN.

How to file a GST amendment (Form REG-14)

For core field changes

1. Log in at www.gst.gov.in with your GSTIN credentials.

2. Go to Services → Registration → Modify Key Registration Fields.

3. Select the relevant tab: Business Details, Principal Place of Business, Additional Place of Business, or Promoters/Partners Details.

4. Make your changes, enter the reason and date, and upload supporting documents.

5. Click Save and Continue.

6. On the Verification tab, select your authorised signatory and verify using DSC or EVC.

7. Submit. You'll get an ARN (Application Reference Number).

8. A tax officer reviews the application. On approval, you get Form REG-15 and an updated registration certificate, both downloadable from the portal.

9. If the officer doesn't act within 15 working days, the amendment is deemed approved automatically.

For non-core field changes

The process matches the above through step 5, but there's no officer review. Your updated information goes straight into the GST database — no ARN, no waiting. It usually takes effect almost immediately.

One catch worth knowing: an amendment application sits open for only 15 days. Start one and don't finish it, and the system deletes it automatically. Don't open an amendment unless you're ready to complete it.

The 15-day deadline

File within 15 days of the change, full stop. For core amendments, the officer has 15 working days to approve or reject; no response means automatic approval. Non-core amendments update immediately, with no waiting period at all.

Missing the deadline doesn't mean you've lost the right to amend, but it can invite more scrutiny, and officials may ask for extra clarification. Filing on time avoids that conversation entirely.

I had a client whose core field amendment needed to be filed within 15 days of a partner transfer. Done on time, it would've taken maybe 20 minutes on the portal. He missed the window and spent the next three months sorting it out instead.

The takeaway

Three things matter here. File within 15 days of any change, or you risk falling out of compliance. Figure out whether your change is core or non-core before you open the portal, since that decides your timeline and paperwork. And remember that PAN changes, constitution changes, and interstate moves can't be handled through an amendment at all — they need a fresh registration.

The process looks bureaucratic on paper, but it's faster than people expect, especially for non-core changes that take a few minutes and need no approval at all. If your GST certificate doesn't match your business today, don't wait for a notice. File the amendment now. Twenty minutes on the portal beats the alternative.

Need help filing your GST amendment? Over 3,000 businesses have used our guides and tools at gstfilling.co to update their GST details without errors or delays. If you're not sure whether your change is core or non-core, or you just want it recorded correctly the first time, grab our free GST Amendment Checklist before you start.

"The authorities should not ask for documents beyond the prescribed limit... Timely processing of amendment applications is mandatory, and failure to process within the prescribed time limit will result in automatic non-approval." — CBIC Instructions, GST Registration Process Guidelines, April 17, 2025

This clause caps how long an officer can leave your application unanswered without consequence.

Related guides:

• GST Registration: The Complete Guide for New Businesses

• ITC Reconciliation: How to Reconcile GSTR-2B with Your Accounts

• GST Cancellation: When and How to Cancel Your GSTIN