How to Update or Change Details in a GST Registration Number?

Your business moved offices last month. Or you added a partner. Or the bank asked for an updated GST certificate and you realised the mobile number on file still belongs to an employee who left two years ago. Whatever brought you here, the good news is the same: you don’t need to cancel your GST registration and start over. There’s a proper amendment process built into the system for exactly this, and most changes can be made from your desk without ever visiting the department in person.

What trips people up isn’t the portal itself — it’s knowing which changes need approval and which don’t, and what documents each one actually wants. Let’s go through it properly.

The first thing to understand: two very different processes

GST amendments fall into two buckets, and the portal treats them completely differently.

Core field amendments cover the details the department actually cares about verifying — legal name of the business, principal place of business, addition or deletion of a partner or director, and additional places of business. These go through a jurisdictional officer for approval and can take a few days to a couple of weeks.

Non-core field amendments cover everything else — mobile number, email address, bank account details, authorised signatory, details of goods or services, and similar administrative information. These update instantly the moment you submit them. No officer, no waiting.

Knowing which bucket your change falls into tells you immediately whether to expect an instant update or a short wait, and it changes what you should upload as supporting proof.

Quick reference: what needs approval and what doesn't

The general process, step by step

Whether your change is core or non-core, you start in the same place:

• Log in to the GST portal with your credentials.
• Go to Services, then Registration, then Amendment of Registration — choose Core Fields or Non-Core Fields depending on what you’re changing.
• Select the field you want to edit. Some fields let you edit directly; others require you to add a new entry and mark the old one as no longer relevant, especially for addresses and authorised signatories.
• Upload supporting documents relevant to that specific change — more on exactly what’s needed below.
• Fill in the reason for the amendment. This is a mandatory free-text field, so keep it factual and brief.
• Verify using DSC for companies and LLPs, or EVC (Aadhaar OTP) for proprietorships and partnerships.
• For non-core changes, the updated certificate is usually available immediately. For core changes, an ARN is generated and the application moves to the jurisdictional officer’s queue.

Changing your business address

This is the single most common amendment businesses in Delhi file, especially with how often small firms move between Karol Bagh, Lawrence Road, Okhla and the Netaji Subhash Place belt as they scale up. It’s also the one people get wrong most often because the proof required depends entirely on whether you own or rent the new premises.

• Owned premises: latest property tax receipt, municipal khata copy, or electricity bill in the owner’s name.
• Rented premises: a valid rent or lease agreement along with one document proving the owner’s ownership, such as a property tax receipt or electricity bill.
• No formal agreement (shared space, consent arrangement): a consent letter from the owner along with their ID proof and an ownership document.

A rent agreement without the owner’s supporting proof is the number one reason address amendments get sent back for resubmission. Officers routinely ask for both together, so don’t upload only the lease.

One detail people miss: if the address change also affects your jurisdiction — moving from one ward or division to another within Delhi, for instance — the application gets reassigned to the new jurisdictional officer, which can add a few extra days beyond the usual window.

Adding or removing a partner, director, or authorised signatory

This one carries slightly more weight because it changes who is legally responsible for the entity. For addition of a new partner or director, you’ll need their PAN, photograph, identity and address proof, and their consent, typically in the form of a signed declaration or board resolution depending on your entity type. For removal, you’ll need a resignation letter or the relevant resolution, along with proof that the change has been reflected wherever else it needs to be, such as the MCA portal for companies and LLPs.

A practical tip: if a partner or director is both leaving and being replaced, file the addition and deletion together in the same application rather than as two separate ones. It keeps the authorised signatory list from having a gap and avoids the awkward window where returns can’t be verified because nobody currently listed has the authority to sign.

Updating mobile number and email

Businesses change hands, employees leave, and the mobile number linked to a GST registration quietly becomes useless for OTPs you actually need. Updating this is refreshingly simple — it’s treated as a non-core amendment, verified by OTP sent to both the old and new number or email, and it updates the same day. No documents, no officer review.

If you’ve lost access to the old number entirely and can’t receive the verification OTP there, this is one of the few situations where you may need to visit the jurisdictional office or raise a grievance on the portal, since the system is built around verifying continuity between old and new contact details.

Changing the legal name of the business

This happens more often than people expect — a proprietorship rebrands, a partnership firm's name changes on its deed, a private company changes its name with the Registrar of Companies. GST treats this as a core field amendment, and the supporting document has to match exactly what triggered the change: an amended partnership deed, a fresh Certificate of Incorporation reflecting the new name, or a gazette notification for certain entity types.

A frequent mismatch: the legal name is updated with the MCA or the Registrar of Firms, but the GST amendment is filed weeks or months later, or never at all. Keep the two in sync, because a GST certificate that doesn’t match your PAN or incorporation documents creates friction at the worst possible moments — usually when a bank or a large customer is verifying your credentials.

Bank account details

You can add, update or remove bank account information any time through the non-core amendment route, and it doesn’t require officer approval. That said, since April 2025 changes, providing at least one valid bank account is mandatory within a prescribed period after registration, and failing to do so can restrict your ability to file GSTR-1 or use the Invoice Furnishing Facility. If you’re updating because your old account was closed, don’t leave this pending — it has a way of blocking return filing at the worst possible time.

What happens if the officer rejects your amendment?

For core field changes, the officer can either approve the amendment, or issue a notice seeking clarification if something in your application looks incomplete or inconsistent, typically within 15 working days. You get a reasonable window to respond with clarification or additional documents. If you don’t respond, or the response doesn’t satisfy the officer, the amendment can be rejected, and you’ll need to reapply with the gaps fixed.

Most rejections in Delhi come down to the same handful of issues: address proof and rent agreement not matching in name, an old address still showing as active when a new one is added, or a scanned document that’s unreadable. None of these are complicated to avoid, they just require a careful first attempt.

Can you amend a GST registration retrospectively?

For some fields, yes — you can specify an effective date in the past for certain amendments, particularly for changes like the addition of a partner where the change genuinely happened earlier and you’re only now updating the record. For address changes, retrospective effect is generally not permitted, and the amendment applies from the date of approval. If your compliance depends on a specific effective date, it’s worth checking this before you file rather than after.

Why timing matters more than people think

Delaying an amendment doesn’t just risk a mismatch with your other legal documents. Invoices raised, e-way bills generated, and returns filed all reference the details on your GST record as it stood at that time. A stale address on invoices can complicate input tax credit claims for your buyers if a department ever questions the place of supply. An outdated authorised signatory can mean returns technically verified by someone no longer authorised to do so. None of this usually causes a problem — until it does, and by then it’s a much bigger fix than a same-day portal update would have been.

Find Step-by-Step Guide for 👉 Online GST Return Filing in Delhi

When to just get help

A straightforward mobile number or bank account update genuinely takes ten minutes and doesn’t need anyone’s help. Where it’s worth engaging a GST registration consultant in Delhi is anything involving a core field — address changes with unclear ownership documents, partner or director changes with legal implications, or a legal name change that needs to be mirrored correctly across GST, PAN and your incorporation documents. Getting the paperwork right the first time avoids the back-and-forth with a jurisdictional officer that can stretch a fifteen-day process into six weeks.

For businesses juggling multiple GSTINs across Delhi and the NCR, or anyone who’s had an amendment rejected once already, proper GST registration services in Delhi are usually worth the modest fee just to get it filed clean the first time.

Find more about 👉 How to get New GST Registration in Delhi

GST amendment rules, document requirements and processing timelines are revised periodically. Please confirm the current position on the GST portal or with your tax advisor before filing. 

Frequently Asked Questions (FAQs)

Q1. Do I need to cancel my GST registration to change my business address?

No.

Q2. How long does a core field amendment take to get approved?

Typically 15 working days, though simple applications with clean documentation are often approved faster. If the officer raises a query, the timeline extends further.

Q3. Can I change my GSTIN number itself?

No, the GSTIN is a permanent 15-digit number tied to your PAN and state. You amend the details registered against it; the number itself never changes unless you cancel and take fresh registration.

Q4. Is there a fee for filing a GST amendment?

No government fee is charged for amendment applications on the portal. Any fee you pay is to a consultant for preparing and filing it on your behalf.

Q5. Can I update my mobile number without an officer's approval?

Yes.

Q6. What documents are needed to change a rented business address?

A valid rent or lease agreement, along with proof of the owner's ownership such as a property tax receipt or electricity bill in the owner's name.

Q7. Can I add a new partner without removing the old one?

Yes, if the old partner is continuing. If they're being replaced, it's best to file the addition and deletion in the same application to avoid a gap in authorised signatories.

Q8. What happens if my amendment application is rejected?

You'll usually get a notice explaining the deficiency and a chance to respond. If unresolved, the application is rejected and you'll need to file a fresh amendment with corrected documents.

Q9. Can I amend my GST registration from another state remotely?

Yes,

Q10. Does changing my trade name affect my GSTIN or legal name?

No. Trade name is a non-core field and updates instantly. It's separate from your legal name, which is a core field requiring supporting documents and officer approval.

Q11. I moved offices within the same city. Does my jurisdiction change?

It might, if the new address falls under a different ward or division. If so, your application gets reassigned to the new jurisdictional officer, which can add a few days to processing.

Q12. Can I file an amendment with a backdated effective date?

For some fields, such as partner addition, yes, if the change genuinely occurred earlier. Address changes generally take effect from the date of approval, not retrospectively.

Q13. What if I've lost access to the mobile number registered on GST?

Since the update process relies on OTP verification of both old and new numbers, losing access to the old one usually means visiting the jurisdictional office or raising a grievance on the portal.

Q14. Is a bank account mandatory on my GST registration?

Yes,

Q15. Should I hire a consultant for a simple non-core amendment?

Not usually necessary — mobile number, email or bank account updates are simple enough to do yourself.

The Filing Zone is a professional online platform offering reliable tax and business compliance services for individuals, startups, and businesses across India. Our services include GST Registration in India, GST Return Filing in India, ITR Filing in India, and other tax-related compliance services.

We simplify complex compliance processes with practical guidance and professional assistance. Our goal is to make tax filing and business compliance easier, more convenient, and less time-consuming.

Looking for hassle-free GST or ITR services? Connect with The Filing Zone today and get professional assistance for your compliance needs.

👉 Get Started with The Filing Zone Today!

Need to correct or update your GST registration details? Learn the process, required documents, and important steps for updating your GST registration details online with the right guidance.