I received a GST notice for mismatch between GSTR-1 and GSTR-3B, how do I respond

Question

The GST department sent me a notice pointing out a difference between the sales I reported in GSTR-1 and the tax I paid in GSTR-3B, and I want to understand what to do. I have been reading conflicting things online and I would like to understand what Indian law actually says about this, which Act and Section applies, what the realistic timelines and costs are, and what I should be doing right now to protect my position. If the matter can be resolved without litigation I would prefer that route, but I want to know what my rights are before I agree to anything or sign any document.

MyVakeel Legal Desk · Accepted Answer

I received a GST notice for mismatch between GSTR-1 and GSTR-3B, how do I respond is governed in India primarily by Central Goods and Services Tax Act, 2017, Section 61, Central Goods and Services Tax Act, 2017, Section 73 and Central Goods and Services Tax Act, 2017. The short answer is set out below, followed by the practical steps most people in this situation need to take. Read it alongside the specific provisions named, because the exact relief available to you turns on the facts you can prove on paper.

Section 61 of the CGST Act, 2017 allows the proper officer to scrutinise returns filed by a registered person for discrepancies, and where GSTR-1, which reports outward supplies, does not match the tax paid in GSTR-3B, this is a common trigger for a scrutiny notice, since the department treats a higher GSTR-1 figure as evidence of a possible tax shortfall in GSTR-3B.

Common genuine reasons for such mismatches include timing differences where an invoice is reported in GSTR-1 in one month but the corresponding tax liability is discharged in a different month's GSTR-3B, credit notes issued but not properly adjusted, or clerical errors in reporting, and identifying which of these applies to your case is the first step to a proper response.

You should reconcile both returns line by line, prepare a working explaining each discrepancy with supporting invoices and credit notes, and respond to the notice within the time allowed through Form ASMT-11 or the equivalent response mechanism, since a well-documented reconciliation often resolves the query without further proceedings.

If the discrepancy genuinely represents short payment of tax, it is advisable to pay the differential tax along with applicable interest under Section 50 voluntarily before or along with the response, since doing so before a formal demand notice under Section 73 is issued can help avoid a higher penalty that applies once a show cause notice is issued for suppression or under Section 74 for fraud cases.

What to do next: 1) Reconcile GSTR-1 and GSTR-3B figures for the disputed period; 2) Identify the specific reason for each discrepancy with supporting documents; 3) Respond to the scrutiny notice with a detailed reconciliation statement; 4) Pay any genuine shortfall with interest before a formal demand notice follows.

If the other side has already issued a notice, filed a case or set a deadline, treat the matter as time-sensitive — most remedies under Central Goods and Services Tax Act, 2017, Section 61 carry limitation periods, and a delay you cannot explain weakens an otherwise strong case. You can post the details on the MyVakeel forum for a practising advocate to review, or book a paid consultation with a Bar Council verified lawyer in this practice area.