📑FAQ on GSTR-1A – Amendment to GSTR-1 (Updated July 2025)

With the GSTN implementing hard locking of auto-populated liabilities in GSTR-3B from July 2025 onwards, a new form—GSTR-1A—has been introduced to manage any corrections or additions to the already filed GSTR-1 or IFF. This blog answers the most common questions about Form GSTR-1A, helping you stay compliant and updated.

❓What is Form GSTR-1A?

Form GSTR-1A is introduced for taxpayers who wish to:

• Amend any B2B supply record furnished in GSTR-1, or
• Add missed supply records pertaining to the same tax period.

This form can be filed after submitting GSTR-1 but before filing GSTR-3B for the same period.

🗓️When is GSTR-1A Available for Filing?

For Monthly Filers:

Available from the later of:

• Due date of GSTR-1 (11th of the following month), OR
• Date of actual GSTR-1 filing

Until: Actual filing of GSTR-3B for the same tax period.

For Quarterly Filers:

Available from the later of:

• Due date of quarterly GSTR-1 (13th of the month following the quarter), OR
• Actual filing date of quarterly GSTR-1

Until: Filing of GSTR-3B for that quarter.

🧾What is the Due Date for Filing GSTR-1A?

There is no fixed due date for GSTR-1A. It can be filed anytime before filing GSTR-3B for the same tax period.

✅Is Filing GSTR-1A Compulsory?

No. Filing GSTR-1A is optional, and only required if:

• You missed any invoice in GSTR-1, OR
• You need to amend any already reported record for the same tax period.

🧑‍💻What Are the Modes of Filing GSTR-1A?

• Online via GST Portal
• Through GSP (GST Suvidha Provider)

🔁Can I Amend Records from Previous GSTR-1 in GSTR-1A?

No. GSTR-1A is strictly for amending records of the current tax period only. To amend previous tax period records, use a subsequent GSTR-1, within permissible time limits.

⚠️What If I Save But Don’t File GSTR-1A?

If you save any records in GSTR-1A but do not file it before filing GSTR-3B:

• The system will block GSTR-3B filing.
• You must either:
  • Delete the saved data
  • Reset the GSTR-1A form
  • Or file GSTR-1A

🧾Can I Add Debit/Credit Notes in GSTR-1A?

Yes. You can add debit or credit notes in the relevant tables of GSTR-1A, for the same tax period.

🔄Can I Amend Recipient’s GSTIN in GSTR-1A?

No. GSTIN of the recipient cannot be amended through GSTR-1A. You must correct the GSTIN in a subsequent GSTR-1 for another tax period.

📤Can I Amend IFF Records in GSTR-1A (for QRMP)?

Yes. If you’re a quarterly filer and you uploaded records via IFF for Month 1 (M1) or Month 2 (M2), you can amend or add those records in GSTR-1A for the same quarter after filing GSTR-1.

🔁Can I File GSTR-1A More Than Once?

No. GSTR-1A can be filed only once per tax period, even if GSTR-3B is not yet filed.

🧮Summary of Key Rules for GSTR-1A

Rule	GSTR-1A Policy
Filing Required?	Optional
Filing Window	Between GSTR-1 and GSTR-3B
Edit Previous Period Data?	❌ No
Edit Current Period Data?	✅ Yes
GSTIN Amendment	❌ Not allowed
Debit/Credit Notes Allowed?	✅ Yes
Mode of Filing	Online / GSP only
Multiple Filings Per Period?	❌ Only Once
Nil Filing?	❌ Not Allowed

📌Final Thoughts

Form GSTR-1A is a crucial tool introduced in line with the new hard lock of GSTR-3B from July 2025. It allows for timely corrections and additions to your outward supply data, helping ensure accurate tax liability and smooth GSTR-3B filing.