Receiving an official GST notice from the Tax Department is stressful. In 2026, GSTN uses automated AI scrutiny tools to issue notices for mismatches between GSTR-1, GSTR-2B, and GSTR-3B.
Ignoring a GST notice or filing an incorrect response can result in cancellation of GSTIN, bank account attachment, and 100% tax penalties.
In this guide, our expert CA explains how to decode GSTR-3A and ASMT-10 notices, statutory response deadlines, and provides an official reply template.
1. Understanding GSTR-3A Notice (Notice to Defaulter)
GSTR-3A is issued under Section 46 when a taxpayer fails to file monthly or quarterly returns.
- Statutory Deadline: Exactly 15 days from notice service date to file pending returns with late fees & interest.
- Risk of Ignoring: Proper officer can issue Best Judgment Assessment under Section 62 with DRC-07 tax demand order.
2. Understanding ASMT-10 Notice (Scrutiny of Returns)
Form ASMT-10 is issued under Section 61 when GST Officers detect mismatches.
Common triggers:
- Input Tax Credit Mismatch: Higher ITC in GSTR-3B than GSTR-2B.
- Taxable Turnover Mismatch: Lower output tax in GSTR-3B than GSTR-1 or e-Way Bills.
- E-Invoicing Discrepancy: Missing IRN e-invoices for B2B.
Statutory Deadline: Submit explanation in Form ASMT-11 within 30 days.
3. CA-Approved Reply Format for ASMT-10
BEFORE THE PROPER OFFICER OF CENTRAL/STATE TAX
GST CIRCLE/WARD: [Your GST Ward Name]
GSTIN: [Your 15-Digit GSTIN] | Legal Name: [Your Business Name]
REPLY TO NOTICE OF SCRUTINY UNDER SECTION 61 (FORM ASMT-11)
Respected Sir/Madam,
With reference to Form ASMT-10 dated [Date], we submit our reply:
- Observation 1 (ITC Mismatch): The difference of Rs. [Amount] pertains to supplier M/s [Supplier Name] who uploaded invoice in subsequent tax period. Annexure-A attached.
- Observation 2 (Output Tax Mismatch): Differential tax of Rs. [Amount] paid via Form DRC-03 vide ARN [ARN] along with Section 50 interest. Annexure-B attached.
PRAYER: We request your good office to accept our explanation and close proceedings under Rule 99(2).