ASMT-10 Notice: How to Reply to GST Return Discrepancies

Form ASMT-10 is a GST return scrutiny notice, not a tax demand. Issued under Sec. 61 CGST Act and Rule 99 CGST Rules, it identifies discrepancies requiring a reply in Form ASMT-11, ordinarily within 30 days of service or the extended time permitted. Reconcile each issue, explain supported differences and pay genuine liabilities correctly. Acceptance is communicated through Form ASMT-12; unresolved issues can lead to further proceedings.

Why have you received an ASMT-10 notice?

An ASMT-10 notice means the proper officer has identified an apparent inconsistency while scrutinising your GST returns and related information.

A mismatch is not automatically unpaid tax. Timing differences, amendments, cancelled transactions and incorrect comparisons can create apparent discrepancies. However, unsupported input tax credit, omitted outward supplies and missed reverse-charge liabilities require corrective action.

Discrepancy flagged	Possible explanation or issue	Evidence to check
GSTR-1 sales exceed GSTR-3B	Invoices reported but tax unpaid, or amendments compared incorrectly	Monthly outward-supply reconciliation and tax-payment records
GSTR-3B ITC exceeds GSTR-2B	Supplier reporting delay, duplicate credit or ineligible claim	Invoice-wise GSTR-2B matching and ITC ledger
E-way bill values exceed returns	Unreported sales, cancelled bills, delivery challans or stock movements	E-way bill register and underlying documents
GST turnover differs from income-tax return	Different recognition, reporting scope or errors	Financial statements and turnover bridge
Reverse charge mechanism, or RCM, tax is unpaid	Missed liability on applicable rent, legal or goods transport agency services	Agreements, supplier status and applicable notifications

RCM does not apply to every rent or GTA payment. Check the transaction, supplier and recipient categories, exemptions and any applicable supplier option before accepting liability.

What deadline and financial-year rules apply?

Reply within the period specified in the notice, ordinarily not exceeding 30 days from service, and apply the law relevant to the financial year under scrutiny.

Under Rule 99 CGST Rules, the officer may permit further time. If records are extensive or unavailable, request an extension before the deadline, explain why it is needed and retain proof. Do not assume that requesting an extension grants one.

The escalation provisions now differ by financial year:

Period concerned	Demand provision if scrutiny escalates
Up to FY 2023-24, without fraud-related allegations	Sec. 73 CGST Act
Up to FY 2023-24, involving fraud, wilful misstatement or suppression to evade tax	Sec. 74 CGST Act
FY 2024-25 onward, including FY 2025-26	Sec. 74A CGST Act, with consequences depending on the circumstances

A notice received during FY 2025-26 may concern an earlier year. The year being examined, not simply the notice date, determines the applicable demand framework. Income-tax provisions for FY 2025-26 / AY 2026-27 remain under the Income-tax Act, 1961, but GST scrutiny follows GST legislation.

How should you prepare and file Form ASMT-11?

Prepare a point-wise ASMT-11 response that connects every explanation or payment to a reconciliation and supporting evidence.

1. Verify the notice. Check the GSTIN, financial year, issuing authority, service date, deadline and discrepancy amount. Download the notice and annexures from the GST portal.

2. Reconstruct the officer’s comparison. Match books, GSTR-1, GSTR-3B, GSTR-2B, relevant annual returns and electronic ledgers. Separate taxable value from tax and IGST from CGST and SGST. Use our GSTR-2B reconciliation guide.

3. Classify every difference. Mark each item as an explained mismatch, an actual liability or an issue needing clarification. Identify amendments, credit notes, later-period reporting and amounts already paid.

4. Test ITC eligibility. Supplier confirmations are supporting evidence, not substitutes for statutory conditions. Check Sec. 16(2) CGST Act, blocked credits under Sec. 17(5) CGST Act and the time limit under Sec. 16(4) CGST Act.

5. Calculate admitted liabilities. Distinguish unpaid output tax from wrongly availed ITC. Determine whether credit was utilised before calculating interest.

6. Make the appropriate payment. Where required, pay through Form GST DRC-03 and quote the acknowledgement, tax heads, period and interest calculation. Do not pay an amount twice merely because it appears in the notice.

7. Submit and preserve proof. File ASMT-11 through the relevant GST portal notice workflow, attach indexed documents and retain the filed response and acknowledgement.

Use a reconciliation with columns for the notice allegation, officer’s amount, taxpayer’s amount, difference, explanation and attachment reference.

How do ITC timing differences and interest affect the reply?

Later supplier reporting may support a subsequent eligible ITC claim, but it does not automatically validate an earlier premature claim.

For FY 2025-26, Sec. 16(4) CGST Act generally limits taking ITC to 30 November 2026 or the date of furnishing the relevant annual return, whichever is earlier. Compliance with this deadline does not remove the other eligibility conditions.

For relevant supplier invoices, examine the communication requirement under Sec. 16(2)(aa) CGST Act. Where credit was taken too early, disclose the claim, reversal and eligible re-availment chronology rather than relying only on eventual GSTR-2B appearance.

Interest also needs separate analysis:

• Delayed output tax: generally attracts interest at 18% per annum under Sec. 50(1) CGST Act, subject to applicable computation rules.
• ITC wrongly availed and utilised: attracts interest at 24% per annum under Sec. 50(3) CGST Act.
• ITC wrongly availed but not utilised: does not attract interest under Sec. 50(3), although reversal or other correction may still be required.

Apply Rule 88B CGST Rules to determine utilisation and the relevant interest period.

What does a costed ASMT-10 example look like?

A defensible response separates explainable credit differences from actual excess credit and calculates interest only on the legally relevant amount and period.

Consider an illustrative Bengaluru trading firm receiving ASMT-10 for FY 2023-24, showing ITC of ₹4.2 lakh above GSTR-2B.

Invoice-level checks identify ₹3.6 lakh relating to invoices suppliers reported in the following financial year, within the applicable Sec. 16(4) deadline. The firm must also demonstrate that its claim, any reversal and subsequent re-availment satisfied the eligibility rules. Later reporting alone is insufficient.

Assume the records establish compliant treatment of that ₹3.6 lakh, while the remaining ₹60,000 is genuinely ineligible ITC that was wrongly availed and utilised for exactly 100 days before payment.

Component	Calculation	Amount
Ineligible ITC	Admitted amount	₹60,000
Interest	₹60,000 × 24% × 100 ÷ 365	₹3,945
Total illustrative payment	ITC plus rounded interest	₹63,945

The firm pays through DRC-03 and submits ASMT-11 with invoice matching, ledger evidence and the interest working. If satisfied, the officer communicates acceptance through ASMT-12. The example assumes no separate penalty-triggering circumstances.

What happens if you ignore the notice or submit a weak reply?

Failure to provide a satisfactory explanation can lead to further scrutiny action, audit, investigation or formal demand proceedings.

Under Sec. 61(3) CGST Act, escalation can include audit under Sec. 65 CGST Act, special audit under Sec. 66 CGST Act or action under Sec. 67 CGST Act, besides the applicable demand route.

ASMT-10 itself does not impose a penalty. Penalties depend on subsequent proceedings, the financial year, the allegations and statutory payment concessions.

Avoid missing the deadline, submitting generic denials, omitting interest where payable or accepting explainable differences without checking the records.

How SP & SC helps

SP & SC Legal and Taxation Services, Bengaluru, reconciles GST data, prepares evidence-backed ASMT-11 replies and assists with representation and escalation.

We review ITC eligibility, RCM, interest calculations and payment records, and handle show cause notices and appeals where required. Explore our tax consultation service.

Fees are a fixed quote after reviewing the case. A named advisor provides a written quote before work starts. Contact SP & SC or message WhatsApp at +91 90356 74566.

Frequently asked questions

What is the time limit to reply to ASMT-10?

Follow the notice deadline, ordinarily within 30 days of service, unless the officer permits further time.

Is ASMT-10 a demand notice?

No. It seeks an explanation of return discrepancies under the scrutiny process.

Can payment alone close the matter?

No. Report the payment and explanation in ASMT-11. Acceptance is communicated through ASMT-12.

Is every GSTR-2B mismatch disallowed ITC?

No. Reconcile invoice timing and eligibility, but later supplier reporting does not automatically cure an earlier invalid claim.

What if the officer rejects my reply?

Further proceedings may follow, including demand action under Sec. 73, Sec. 74 or Sec. 74A CGST Act, depending on the financial year and circumstances.