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GSTR-1A

10 July 2025 by
GSTR-1A
Team Nexgen VIRTUAL CA
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What is Form GSTR-1A?

· Every GST-registered person has to file details of outward supplies (sales) in Form      GSTR-1.

· If any detail is missed or incorrect, correction can be made:

o   Either in Form GSTR-1A for the same month (before filing GSTR-3B).

o   Or in subsequent Form GSTR-1 of future months.

 

Important Points About Form GSTR-1A

✔ Filing GSTR-1A is optional. Use it only if you want to add or correct details.

✔ It can be filed only once for a tax period.

✔ No amendments allowed for invoices reported through IFF under QRMP scheme.

✔ You cannot change recipient’s GSTIN through GSTR-1A. Such correction can only be done in future GSTR-1.

 

Timeline for Filing GSTR-1A

  • No strict due date.
  • But it must be filed before filing GSTR-3B of that tax period.
  • Available on GST portal:
    • From later of due date or actual filing date of GSTR-1.
    • Till filing of GSTR-3B for that month.

 

How GSTR-1A Impacts GSTR-3B & GSTR-2B

✔ GSTR-3B auto-populates with changes made through GSTR-1A.

✔ Changes made in GSTR-1A reflect in the next month’s GSTR-2B of the buyer.

✔ Through IMS (Invoice Management System), buyers can accept/reject invoices filed in GSTR-1 or GSTR-1A before their GSTR-3B filing.

 

Practical Example

Invoice Month

Invoice No.

Reported in

Date of Return Filing

When It Appears in Recipient's GSTR-2B

Jan 2023

Invoice 1

GSTR-1

08-02-2023

14-02-2023

Jan 2023

Invoice 2

GSTR-1A

15-02-2023

14-03-2023

 

How to File Details in Form GSTR-1A

The details to be furnished are similar to GSTR-1. Below are key points:

B2B Supplies

  • Additional or amended invoices for registered buyers to be reported invoice-wise.

      B2C Large Supplies

  • Inter-State sales to unregistered persons above ₹1 lakh to be reported invoice-wise.
  • Amendments also allowed invoice-wise.

B2C Small Supplies

  • Sales below ₹1 lakh reported consolidated (state-wise, rate-wise).
  • Additional details or amendments can be done accordingly.

Export Sales & SEZ

  • Additional or amended details reported invoice-wise in relevant tables.

Debit/Credit Notes

  • Additional notes or amendments reported in designated tables.

Advances & Adjustments

  • Additional or amended advance receipts or adjustments to be reported properly.

Nil Rated/Exempt/Non-GST Supplies

  • Additional details to be reported in relevant table.

HSN Summary

  • Additional/amended HSN-wise details (with units and rates) to be reported.
  • Downward revisions allowed with minus (-) sign.

Documents Issued

  • Details of documents like invoices, debit/credit notes, etc., issued during the period to be reported.

 

Summary

Form GSTR-1A is a useful optional tool to fix errors or add missing sales details for the same month, provided you do it before filing GSTR-3B. It ensures that:

  • Correct details go to your buyer’s GSTR-2B.
  • Accurate tax liability reflects in your GSTR-3B.

Use it carefully as you get only one chance per month.

in GST
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