GST ASMT-10 scrutiny notice: what it is and the first steps before you reply

Last updated 14 Oct 2026 · India

Short answer. Form GST ASMT-10 is a notice issued when a proper officer scrutinises your returns and finds something that needs explanation (mismatches, anomalies or risk flags). It is not by itself a demand order — it asks you to respond with an explanation and documents by the date in the notice. Start on the GST portal under the assessment / user services area described in the assessment user guide, and involve your CA the same day you receive it.

What ASMT-10 is (and is not)

Is: a scrutiny intimation / notice seeking your explanation on return-related issues.
Is not: the final tax demand. Later forms in the assessment chain deal with acknowledgements, further notices and orders if the officer is not satisfied.

Buyers often panic because the portal message looks like an instant penalty. The first job is to read the issues listed and match them to GSTR-1, GSTR-3B, books and e-invoice data.

First steps (day 0–2)

Download the notice PDF and note the due date for reply and the GSTIN / period mentioned.
Forward it to your CA with GSTR-1, GSTR-3B, GSTR-2B and the sales/purchase register for that period.
List each discrepancy the officer raised (for example table mismatch, ITC vs GSTR-2B, turnover gap).
Do not ignore it — non-reply can escalate to further assessment action.
Reply on the portal in the form the notice requires (often ASMT-11 for the taxpayer's reply — confirm the exact form name shown in your notice and the assessment guide), attaching workings.

Common mistakes

Deleting the email / SMS and waiting for a second reminder.
Replying with one vague sentence and no reconciliations.
Fixing only the return without explaining what happened in the period under scrutiny.
Missing the portal due date because someone was on leave.

Checklist

Notice PDF saved with due date in the calendar
CA assigned and has the return pack
Each issue mapped to a working paper
Portal reply filed before the deadline
Acknowledgement downloaded

Frequently asked questions

What is GST ASMT-10?

A scrutiny notice from a GST officer asking you to explain issues found while scrutinising your returns.

Is ASMT-10 a tax demand?

No. It is a notice seeking explanation. A demand, if any, comes through later assessment steps if differences remain.

What should I do first?

Download the notice, diary the reply date, send it to your CA with the relevant returns and books, and prepare a point-by-point reply on the portal.

Where is the official assessment help?

GST portal assessment user guide: https://tutorial.gst.gov.in/userguide/assessment/index.htm

Official sources

Not tax or legal advice. This is a free explainer of public rules; deadlines and rules can change by notification, so confirm on the official portal or with your CA before you file. Last checked 14 Oct 2026.

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