What an ASMT-10 is and why you received it
Form GST ASMT-10 is a scrutiny notice issued under Section 61 of the CGST Act, read with Rule 99. The proper officer scrutinises your filed returns, finds one or more discrepancies, and asks you to explain them. It is the mildest form of GST proceeding, an enquiry, not yet a demand, and it is the best opportunity to resolve an issue before it becomes expensive.
ASMT-10 notices are usually system-driven. The common triggers are:
- Input tax credit claimed in GSTR-3B exceeding the credit available in the auto-populated GSTR-2B.
- A difference between the outward liability declared in GSTR-1 and the tax paid in GSTR-3B.
- A mismatch between turnover in GST returns and the turnover in the income-tax return or the e-way bill data.
- Reverse charge liability that appears to be under-declared.
- Credit availed from suppliers whose registration was cancelled or who did not file returns.
Because most of these are data mismatches, most of them can be explained with a reconciliation. That is the heart of an ASMT-10 reply.
The deadline and the reply form
You reply to an ASMT-10 in Form GST ASMT-11, filed online on the GST portal. The notice states the time to reply, which is normally 30 days from service. There are two ways to respond, and you can combine them:
- Explain the discrepancy. If the figures are correct and the mismatch has an explanation, set it out in ASMT-11 with a reconciliation and supporting documents.
- Accept and pay. If part of the discrepancy is genuinely payable, pay the tax with interest through Form GST DRC-03 and say so in the ASMT-11 reply. Voluntary payment at this stage keeps penalty exposure low.
The 30 days are real. If you do not reply, or your explanation is found unsatisfactory, the officer may proceed under Section 65 (audit), Section 66 (special audit), Section 67 (inspection), or directly to a demand under Section 73 or 74. Every one of those routes costs far more in time and money than a clean ASMT-11 reply.
How to build the ASMT-11 reply
A strong reply is built around documents, not adjectives. The structure we use:
- Take each discrepancy separately. Quote the exact point raised in the ASMT-10 and answer it on its own.
- Attach the reconciliation. For an input tax credit point, reconcile GSTR-3B with GSTR-2B and your purchase register, and explain timing differences (credit of one period appearing in another) or supplier filing delays. For a liability point, reconcile GSTR-1 with GSTR-3B.
- Produce the primary records. Invoices, e-way bills, bank statements, ledgers and contracts that prove the transaction is genuine.
- Where you accept part, show the DRC-03. Reference the challan and the amount paid.
- Close with a request. Ask the officer to accept the explanation and close the scrutiny in ASMT-12.
If the officer is satisfied, the scrutiny is closed with an intimation in Form GST ASMT-12, and the matter ends there. This is the outcome to aim for.
How an ASMT-10 escalates, and how to prevent it
An unanswered or unconvincing ASMT-10 does not simply disappear. It typically escalates to a show cause notice in Form GST DRC-01 under Section 73 or 74. At that point the penalty exposure rises, the limitation clock is engaged, and the cost of defending the matter multiplies.
Prevention is simple in principle and demanding in practice: reply within time, reconcile every figure, and produce the documents. Many input tax credit mismatches are nothing more than a supplier filing late or a timing difference, but the officer cannot assume that, you have to prove it. The detail on input tax credit mismatches and the DRC-01C process is covered in our note on DRC-07 and ITC mismatch, and the broader appeal strategy in the GST litigation pillar guide.
