If you receive Form GST REG-03, reply to the exact clarification points through Form GST REG-04 on the GST Portal rather than uploading a generic letter. CBIC Instruction 03/2025-GST states the applicant is required to furnish REG-04 within 7 working days from receipt of REG-03; the officer then examines the clarification/documents. Read each query, correct only the relevant registration fields where needed and attach clear supporting evidence.
What this means for the business owner
If you receive Form GST REG-03, reply to the exact clarification points through Form GST REG-04 on the GST Portal rather than uploading a generic letter. CBIC Instruction 03/2025-GST states the applicant is required to furnish REG-04 within 7 working days from receipt of REG-03; the officer then examines the clarification/documents. Read each query, correct only the relevant registration fields where needed and attach clear supporting evidence.
The return/application history and underlying source records should tell one consistent story before any correction, payment or clarification is submitted.
Who should use this guide
This guide is for taxpayers facing the exact fact pattern in the title. It is especially useful when the portal and your books/documents do not agree, when another person handled the original filing, or when a current application/return deadline is approaching.
Why this problem usually happens
Common triggers are premises proof, name/address mismatch, Aadhaar/identity issue, unclear business activity or inconsistent uploaded documents.
What should be checked immediately
Do not start with a correction entry. First collect the minimum evidence needed to prove what actually happened.
| REG-03 query | REG-04 response |
|---|---|
| Premises proof | Upload valid possession + ownership evidence |
| Address mismatch | Explain/correct mapped address |
| Business activity | Clarify actual goods/services |
| Aadhaar/identity | Resolve requested authentication/evidence |
What to do now
Download REG-03 PDF, make a query-by-query response table, amend permitted fields through the clarification workflow and upload only documents that answer each issue. Submit before the notice deadline and save acknowledgement.
Before submission, the client should receive a concise summary of the problem, the proposed tax/ITC/registration treatment, payment impact and any unresolved item. After submission, keep the ARN/order/acknowledgement and filed copy.
The 2026 legal and portal position
REG-03 is a notice seeking clarification on the registration application; REG-04 is the applicant reply. Current CBIC instruction confirms the 7-working-day response period.
GST Portal workflows, notifications and due-date extensions can change. The official sources below were checked for this article on 19 August 2026; recheck them immediately before filing if the matter is time-sensitive.
A realistic hypothetical
REG-03 asks for ownership proof because the electricity bill name differs from the lease. The proper reply is the valid lease plus lessor ownership proof and concise explanation—not a 20-page business profile.
What happens if the problem is ignored
No reply within the prescribed period can lead to rejection in REG-05 under the current registration-processing instruction.
What TargoLegal checks before filing or responding
TargoLegal converts REG-03 into a checklist, validates each document and prepares REG-04 for applicant approval.
Before filing
Documents received, missing items, reconciliation difference, legal/portal route, payment impact and client approval.
After filing
Filed copy, ARN/acknowledgement, payment proof and a short open-items list for the next period.
What to send for a first review
Received REG-03? Send the notice PDF and ARN/TRN.
Related questions
What should I send first?
Send the GSTIN/ARN, the exact period or application stage, and the document that shows the problem. For this topic, the most useful starting point is: REG-03 PDF/reference number, TRN/ARN, Original application.
Can I fix this by making an adjustment in the next return?
Not automatically. A later adjustment is appropriate only when the GST law and current portal workflow allow it and the original error has been reconciled.
Should I rely only on what the GST Portal auto-populates?
No. Portal data is essential evidence, but the taxpayer remains responsible for reconciling it with books, invoices and the applicable legal conditions.
What should I keep after the correction or filing?
Keep the filed return/form, ARN or acknowledgement, payment evidence, reconciliation working and any supplier/customer correspondence that explains the change.
When should professional review be considered?
Use professional review where the issue affects material tax or ITC, several periods, a registration notice, refund, e-invoicing, cancellation/revocation or a customer’s credit.
Official sources used
Legal and portal claims on this page use official GST Portal/GSTN, CBIC, GST Council, India Code or official IRP sources. Forum discussions were used only to understand real user questions, not as legal authority.
TargoLegal Research and Editorial Desk · Last legally reviewed: 19 August 2026. Recheck live forms, notifications, portal workflows and dates before acting.
