Amendment in GST: Core vs Non-Core Fields (2026)

Amendment in GST: Core vs Non-Core Fields

Amendment in GST usually refers to updating the details on your GST registration certificate, your business address, trade name, partner or director list, bank account, or authorised signatory, filed through Form GST REG-14 on the GST portal. Which fields you're changing determines everything else about the process: non-core fields are auto-approved the moment you submit the form, while core fields, anything touching your legal identity or business structure, need sign-off from a jurisdictional GST officer, with a 15-working-day clock and a deemed-approval safety net if the officer doesn't act.

This page sits at the intersection of two clusters: our GST Registration guide, which covers registering a business for GST from scratch, and our GST Return Filing guide, since GST amendments also come up at the return level, not just the registration level. This page focuses primarily on registration amendment, the more frequently searched and more procedurally involved of the two, and points you to the right resource if what you actually need is a return-level correction.

Quick Answer: How GST Amendment Works

• Legal basis: Section 28 of the CGST Act, 2017, read with Rule 19 of the CGST Rules, 2017.
• The form: every registration amendment, core or non-core, is filed through Form GST REG-14 on the GST portal.
• Time limit: you must file the amendment application within 15 days of the change that triggered it, address change, new partner joining, bank account update, and so on.
• Non-core fields (email, mobile, bank details, authorised signatory, minor address details): auto-approved instantly on submission, no officer review at all.
• Core fields (legal name, principal or additional place of business, addition or deletion of partners/directors/promoters): require jurisdictional officer approval, issued as Form GST REG-15, typically within 15 working days. If the officer takes no action and raises no query, the amendment is deemed approved automatically.
• PAN can never be amended on an existing GSTIN. Since a GSTIN is entirely PAN-based, a change in PAN requires cancelling the existing registration and applying fresh.
• There's no government fee for filing a GST amendment application.

Core Fields vs Non-Core Fields: The Distinction That Decides Everything

This single classification determines your entire amendment workflow, so it's worth understanding clearly before filing anything.

Core fields include:

• Legal name of the business (without any change in PAN)
• Principal place of business, within the same state
• Addition of an additional place of business, within the same state
• Addition, deletion, or change of partners, directors, karta, trustees, or the managing committee

Non-core fields cover everything else, including:

• Trade name
• Mobile number and email address (subject to separate OTP verification)
• Bank account details
• Authorised signatory details
• Minor changes to business details that don't touch legal identity or ownership structure

The practical difference: a non-core amendment updates your registration certificate within minutes of submission. A core amendment goes into a review queue and can take up to 15 working days if the officer doesn't act promptly, though most straightforward, well-documented applications don't need the full window.

Step-by-Step: Filing Form GST REG-14

1. Log into the GST portal and navigate to Services → Registration → Amendment of Registration Core Fields (or Non-Core Fields, depending on what you're changing).
2. Select the relevant tab, Business Details, Address, or Promoters/Partners, based on the specific field you're amending.
3. Enter the updated information and upload supporting documents relevant to the change, an updated rent agreement for an address change, an appointment resolution for a new director, and so on.
4. State the reason for the amendment and the effective date of the underlying change, not the date you're filing.
5. Submit using DSC, e-signature, or EVC. An Application Reference Number (ARN) is generated, which you can track for status.
6. Non-core amendments update immediately. Core amendments move to the jurisdictional officer for review.

What Happens After You File a Core Field Amendment

For core fields, the application doesn't update automatically, it goes to a human reviewer. From there, one of three things happens:

• The officer approves it, issuing Form GST REG-15 as confirmation, generally within 15 working days of the application.
• The officer raises a query, issuing Form GST REG-03, if something in the application needs clarification or additional documentation. You then have to respond, typically through Form GST REG-04, and failing to respond adequately can result in the amendment being rejected outright.
• The officer takes no action at all within the 15-working-day window. In this case, the amendment is deemed approved automatically, and your registration certificate updates without a formal order being issued.

An important detail on timing: once approved, whether formally or by deemed approval, the amendment takes legal effect from the date of the event that caused the change (or the date you submitted the application, depending on the specific field), not the date the officer eventually signs off. This matters for invoicing and compliance during the review window, since the change is treated as effective retroactively to that earlier date once approved.

What You Cannot Amend: PAN

This is worth stating plainly, since it comes up often. A GSTIN's PAN can never be changed through an amendment application. A GSTIN is structurally derived from the applicant's PAN, so if the business's PAN itself changes, for instance following a change in constitution from a proprietorship to a company, there's no amendment route available. The existing GST registration has to be cancelled, and a fresh registration applied for under the new PAN. This is a different, more involved process than a standard REG-14 amendment, and it's worth planning for well ahead of the underlying change, since it briefly interrupts your ability to transact under the old GSTIN.

A Detail Most Guides Skip: The Core-Field Lock

Here's an operational quirk worth knowing before you file: if you have a core field amendment application pending (an ARN generated but not yet approved by the officer), you cannot simultaneously file a non-core field amendment until that core application is resolved. In practice, this means businesses juggling multiple changes at once, a new director joining alongside a bank account update, for instance, need to sequence their filings deliberately rather than submitting everything together, or the second application will simply be blocked until the first clears.

Documents Typically Needed for Common Amendments

• Change of principal or additional place of business: updated rent agreement or ownership proof, a fresh NOC from the property owner, and a recent utility bill, the same standard address-proof format used across GST and MCA filings.
• Addition or removal of a partner or director: the relevant appointment or resignation resolution, along with identity and address proof of the incoming individual.
• Change of legal or trade name: the underlying legal document confirming the name change, a fresh Certificate of Incorporation from the RoC for a company name change, or an updated partnership deed for a firm.
• Bank account update: a cancelled cheque or bank statement showing the account holder's name and IFSC code matching the registered entity.

Amendment vs Cancellation: Not the Same Thing

An amendment updates specific details while keeping the same GSTIN active and continuous. Cancellation ends a GST registration entirely, either voluntarily (the business has closed, merged, or no longer meets the registration threshold) or by the department. The two are sometimes confused because both start from the same "Registration" menu on the portal, but they lead to entirely different outcomes: amendment keeps your compliance history and GSTIN intact; cancellation ends it, requiring a fresh registration if the business needs to operate under GST again later.

Amending Return Data, as Opposed to Registration Data

Everything above concerns your registration record, name, address, structure, bank details. A separate kind of amendment applies to data already reported in a filed GST return, most commonly a mistake in an outward supply invoice reported through GSTR-1. Since July 2025, GSTR-3B's outward supply figures auto-populate from GSTR-1 and are largely non-editable, which makes the correction form for return data, GSTR-1A, considerably more important than it used to be. This is a distinct process from registration amendment covered on this page, with its own mechanics, timing, and consequences. Our GSTR-1 vs GSTR-3B guide covers GSTR-1A and the full return-correction workflow in detail.

Common Mistakes When Filing a GST Amendment

• Missing the 15-day filing window after the underlying change occurs, and only filing the amendment once a mismatch or notice forces the issue.
• Filing a core and non-core amendment simultaneously, not realising the core application has to clear first.
• Assuming PAN can be updated through REG-14, when the actual requirement is cancellation and fresh registration.
• Submitting a core field change without adequate supporting documents, triggering a REG-03 query and a delay that better documentation upfront would have avoided.
• Confusing registration amendment with return correction, and looking for an address change inside GSTR-1A, or a GSTIN typo fix inside REG-14, when each belongs to a different process entirely.

Frequently Asked Questions

How long does a GST registration amendment take?

Non-core field amendments update immediately on submission. Core field amendments generally take up to 15 working days for officer approval, though a straightforward, well-documented application is often processed faster, and an unattended application is deemed approved automatically once the 15-day window passes.

Can I change my business address in GST registration?

Yes, through Form GST REG-14. If the new address is within the same state, it's treated as a core field change requiring officer approval. Moving to a different state involves a more significant process, since GST registration is state-specific.

Is there a fee for filing a GST amendment?

No, there's no government fee for filing an amendment application on the GST portal, regardless of whether it's a core or non-core field change.

Can I amend my PAN on an existing GST registration?

No. PAN cannot be changed through an amendment. Since GSTIN is structurally tied to PAN, a PAN change requires cancelling the existing registration and applying for a new one under the updated PAN.

What happens if the GST officer doesn't respond to my core field amendment application?

If the officer takes no action and raises no query within 15 working days, the amendment is deemed approved automatically, and your registration updates without a formal approval order.

Is amending my GST registration the same as correcting a mistake in a filed GST return?

No, they're entirely separate processes. Registration amendment (Form GST REG-14) updates your business's registered details, name, address, partners, bank account. Correcting data already reported in a filed return, most commonly an outward supply entry, uses Form GSTR-1A instead, a distinct process specific to return data.

Get Your GST Amendment Filed Correctly the First Time

A core field amendment with incomplete documentation doesn't just delay approval, it can trigger a formal query that adds weeks to what should be a routine update. LegalDev handles GST registration amendments, address changes, partner updates, and the return-level corrections that follow, end to end. See our GST Registration guide for new registrations, or our GST Return Filing service if what you actually need is a correction to a filed return rather than your registration record.