Under QRMP, eligible taxpayers file GSTR-1 and GSTR-3B quarterly while paying tax monthly. Mistakes often come from treating IFF as a monthly return, using PMT-06 payment as if it filed the return, duplicating Month 1/2 invoices again in quarterly GSTR-1, or misclassifying cash payments. Rebuild the quarter as one lifecycle: IFF → monthly payment → quarterly GSTR-1 → quarterly GSTR-3B → cash-ledger reconciliation.
What this means for the business owner
Under QRMP, eligible taxpayers file GSTR-1 and GSTR-3B quarterly while paying tax monthly. Mistakes often come from treating IFF as a monthly return, using PMT-06 payment as if it filed the return, duplicating Month 1/2 invoices again in quarterly GSTR-1, or misclassifying cash payments. Rebuild the quarter as one lifecycle: IFF → monthly payment → quarterly GSTR-1 → quarterly GSTR-3B → cash-ledger reconciliation.
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
Confusion comes from three different portal actions happening in one quarter.
What should be checked immediately
Do not start with a correction entry. First collect the minimum evidence needed to prove what actually happened.
| QRMP component | Purpose | Common mistake |
|---|---|---|
| IFF | Optional B2B reporting Month 1/2 | Duplicated in quarter GSTR-1 |
| PMT-06 | Monthly tax deposit/payment | Assumed to be return filing |
| Quarter GSTR-1 | Full quarterly outward statement | Missing IFF reconciliation |
| Quarter GSTR-3B | Quarterly summary return | Cash ledger not matched |
What to do now
For each month mark invoices in IFF/not in IFF, PMT-06 payment, cash ledger and quarter-end GSTR-1/3B. Remove duplication and trace over/under-payment into the cash ledger.
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
GST Portal’s QRMP scheme is for eligible taxpayers to file GSTR-1 and GSTR-3B quarterly while paying monthly. IFF is optional for specified B2B invoice reporting in the first two months.
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
A taxpayer uploads April B2B invoices through IFF, then uploads them again in June quarterly GSTR-1. The duplicate outward data can flow into customer records and liability; the quarter must be corrected from document-level history.
What happens if the problem is ignored
QRMP mistakes can create duplicate sales, cash stranded in ledger or unpaid quarter-end liability.
What TargoLegal checks before filing or responding
TargoLegal maps all three months, IFF, PMT-06, quarterly returns and cash ledger before correction.
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
Using QRMP and unsure what was filed? Send the quarter.
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: Quarter, IFF downloads for Month 1/2, PMT-06/challans.
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.
