GST ASMT-10 Notice Reply: Complete Guide for CAs (March 2026 Deadline Alert)

If you are a practicing CA in India, the last two weeks of March 2026 are unlike anything you have experienced before. GST officers across the country are issuing ASMT-10 scrutiny notices at an unprecedented pace — driven by the looming expiry of the limitation period for FY 2021-22 on March 31, 2026. Many firms are reporting 5x to 10x their normal volume of scrutiny notices arriving simultaneously.

This guide covers everything you need to respond effectively: the legal framework, common discrepancy types, the correct reply format in ASMT-11, procedural defenses, appeal routes, and practical strategies for managing the volume.

What Is ASMT-10? The Legal Framework

Form GST ASMT-10 is the scrutiny notice issued by the proper officer under Section 61 of the CGST Act, 2017, read with Rule 99 of the CGST Rules, 2017. It is not a show cause notice (that is DRC-01 under Section 73/74). The distinction is important — ASMT-10 is a preliminary scrutiny notice, and a well-crafted response at this stage can prevent the matter from escalating to a formal demand.

How Section 61 Works

Section 61 empowers the proper officer to scrutinize the return and related particulars furnished by the registered person to verify the correctness of the return. The officer may inform the taxpayer of discrepancies noticed and seek an explanation. The key provisions:

• Section 61(1): The proper officer may scrutinize returns to verify correctness. No prior approval from a higher authority is required.
• Section 61(2): If discrepancies are noticed, the officer shall inform the registered person and seek an explanation within a specified time (typically 30 days, though many notices grant only 15 days).
• Section 61(3): If the explanation is satisfactory, no further action is taken — the officer drops the scrutiny. If the explanation is not satisfactory, or no reply is received, the officer may initiate action under Section 65 (audit), Section 66 (special audit), Section 67 (inspection/search), or proceed under Section 73/74 (demand proceedings).

Rule 99: The Procedural Backbone

Rule 99 of the CGST Rules prescribes the procedure:

1. The proper officer issues Form ASMT-10 specifying the discrepancies.
2. The registered person must reply in Form ASMT-11 within the time specified (or seek an extension).
3. If the reply is accepted, the officer issues an order of acceptance in Form ASMT-12 (no adverse consequences).
4. If the reply is not accepted, the officer records reasons and may initiate further proceedings.

The critical point: ASMT-10 is an opportunity to explain before the department takes any coercive action. A thorough, well-documented reply in ASMT-11 can close the scrutiny entirely.

Why the March 2026 Surge

The current flood of ASMT-10 notices is not a coincidence. It is a direct consequence of limitation period mechanics.

The Limitation Calculation

For FY 2021-22, the due date for the annual return (GSTR-9) was December 31, 2022. Under Section 73(10), the order must be issued within three years from the due date of the annual return. That puts the baseline deadline at December 31, 2025 for normal cases.

However, Section 168A extensions (COVID-era notifications) pushed this deadline further. Multiple notifications — particularly Notification No. 09/2023-CT dated March 31, 2023, and subsequent extensions — extended the limitation period for FY 2021-22 to March 31, 2026 in many states.

This means that for FY 2021-22:

• Officers must complete proceedings by March 31, 2026
• SCNs under Section 73 must be issued at least 3 months before the order deadline (i.e., by December 31, 2025)
• ASMT-10 notices, being preliminary in nature, are being issued right up to mid-March 2026 as a precursor to potential Section 73 proceedings

The Practical Impact

Many officers who have not yet initiated scrutiny for FY 2021-22 are now issuing bulk ASMT-10 notices to keep the limitation alive. Some officers may attempt to convert unsatisfactory ASMT-10 responses directly into Section 73 proceedings within the remaining days of March. This is aggressive, and there are procedural arguments against it (see the defense strategies below), but it is happening on the ground.

For FY 2020-21, the extended limitation has already expired in most cases, but some states may still have live proceedings depending on specific notification dates.

Common Discrepancies in ASMT-10 Notices

Based on the current wave of notices, the following five discrepancy types account for the vast majority of ASMT-10 scrutiny grounds.

1. ITC Mismatch: GSTR-2A/2B vs GSTR-3B

This is by far the most common ground — sometimes representing 70% or more of all ASMT-10 notices in the current batch. The officer flags a difference between the ITC claimed in GSTR-3B and the ITC reflected in GSTR-2A (for periods before January 2022) or GSTR-2B (from January 2022 onwards).

Why it happens: Supplier delayed filing, supplier filed with errors, the taxpayer claimed ITC based on invoices before the supplier uploaded them, or timing differences in return filing.

Defense approach:

• Prepare a month-wise reconciliation of GSTR-2A/2B vs GSTR-3B, identifying each invoice that contributes to the mismatch.
• For FY 2021-22 specifically, GSTR-2A was still the operative auto-populated statement for most of the year. GSTR-2B became mandatory only from January 2022.
• Cite Suncraft Energy Pvt. Ltd. vs. ACGST (Calcutta HC, 2023): GSTR-2A is a facilitative tool, not a condition precedent for ITC availment. The buyer cannot be penalized for the supplier's non-compliance.
• Cite D.Y. Beathel Enterprises vs. State Tax Officer (Madras HC, 2022): ITC denial based solely on GSTR-2A mismatch without independent verification is unsustainable.
• Cite LGW Industries Ltd. vs. Union of India (Calcutta HC, 2022): The recipient is not expected to track whether the supplier has filed returns.
• Attach copies of all tax invoices, proof of payment to the supplier (bank statements), and proof of receipt of goods/services (delivery challans, GRNs, service completion certificates).
• If the supplier has subsequently filed returns and the mismatch has been resolved, show the updated GSTR-2A/2B reflecting the correction.

2. Turnover Mismatch: GSTR-1 vs GSTR-3B

The officer identifies a difference between the outward supply declared in GSTR-1 (invoice-level data) and the aggregate turnover reported in GSTR-3B. This can go either way — GSTR-1 may show higher or lower turnover than GSTR-3B.

Why it happens: Credit notes filed in different periods, amendments to invoices, zero-rated supplies reported differently, rounding differences, or genuine errors in one return that were corrected in subsequent periods.

Defense approach:

• Prepare a month-wise GSTR-1 vs GSTR-3B reconciliation, clearly explaining each variance.
• If credit notes or debit notes cause the difference, list each CN/DN with the original invoice it relates to.
• If amendments were filed in subsequent periods, show the amendment trail.
• Demonstrate that the correct tax has been paid — even if GSTR-1 and GSTR-3B show different numbers, what matters is whether the correct liability was discharged.
• Attach GSTR-1, GSTR-3B, and GSTR-9 for the relevant period to show that the annual return reconciles the differences.

3. RCM Non-Compliance

The officer identifies supplies on which Reverse Charge Mechanism (RCM) should have been applied under Section 9(3) or Section 9(4) of the CGST Act, but no RCM liability was discharged.

Common RCM triggers for FY 2021-22: Legal services, GTA services (where GTA has not opted to pay forward charge), sponsorship services, security services by non-corporate entities, renting of motor vehicles by non-body corporate, and services by an unregistered person to a registered person (Section 9(4) — though this was largely dormant until reactivation for specific categories).

Defense approach:

• If RCM was paid, show GSTR-3B Table 3.1(d) entries and the corresponding ITC claim in Table 4.
• If RCM was not applicable (e.g., GTA opted for forward charge), attach the GTA's declaration/undertaking.
• If the officer is alleging Section 9(4) RCM for all purchases from unregistered persons, note that this provision was effectively suspended from October 13, 2017 to September 30, 2019, and thereafter applies only to specified categories — not all unregistered supplies.

4. Exempt Supply Ratio and ITC Reversal (Rule 42/43)

Where the taxpayer makes both taxable and exempt supplies, ITC attributable to exempt supplies must be reversed under Rule 42 (for inputs and input services) and Rule 43 (for capital goods). The officer may flag that the reversal is inadequate or not performed.

Why it happens: Incorrect categorization of exempt vs. taxable supplies, non-inclusion of certain exempt supplies (e.g., interest income on fixed deposits, sale of land) in the reversal calculation, or computational errors.

Defense approach:

• Prepare the Rule 42/43 reversal working in detail, showing the exempt supply ratio, total ITC, and the amount reversed.
• Note that interest on fixed deposits is an exempt supply under Entry 27 of Notification 12/2017-CT(R) and must be included in the denominator for Rule 42 calculations — this is a common oversight.
• If the reversal was done in the annual return (GSTR-9), demonstrate that the annual reconciliation accounts for the full-year reversal.
• Cite CBIC Circular 170/02/2022-GST which clarified several aspects of Rule 42/43 calculations.

5. E-Way Bill vs Return Discrepancy

The officer cross-references e-way bill data with GSTR-1 filings and identifies goods movements for which no corresponding supply is reported, or vice versa.

Why it happens: E-way bills generated for stock transfers or job work (not supply), e-way bills cancelled after generation, supplies reported in a different month than the e-way bill date, or e-way bills generated by the transporter rather than the supplier.

Defense approach:

• Reconcile every e-way bill with the corresponding GSTR-1 entry or explain why no GSTR-1 entry exists (stock transfer, job work, cancelled e-way bill).
• For stock transfers, attach delivery challans and show corresponding entries in GSTR-1 Table 13 (if reported as "no supply" movements).
• Demonstrate that e-way bills for branch transfers or job work do not give rise to a tax liability.

Drafting the ASMT-11 Reply: Format and Structure

The reply must be filed in Form ASMT-11 on the GST portal. However, given space constraints on the portal, the standard practice is to file ASMT-11 with a brief response and attach a detailed written submission as a PDF.

Recommended Reply Structure

1. Cover Page

• GSTIN and legal name of the taxpayer
• ASMT-10 reference number, date, and issuing officer
• Financial year and return periods under scrutiny

2. Preliminary Objections (if any)

• Limitation — if the notice covers periods for which limitation has expired
• Jurisdiction — if the notice is issued by an officer without territorial jurisdiction
• Vagueness — if the discrepancy is stated in aggregate without specifying months, invoices, or amounts
• Prior proceedings — if the same period/issue is already subject to audit or demand proceedings (no parallel scrutiny under Section 61 when Section 65/73/74 proceedings are pending)

3. Discrepancy-Wise Response

For each discrepancy listed in the ASMT-10, provide:

• The exact discrepancy as stated by the officer (quote the notice)
• Your factual explanation with supporting data
• Reconciliation workings (preferably in tabular format)
• Legal citations supporting your position
• List of documents attached as evidence

4. Summary Table

Sr.	Discrepancy	Amount per Officer	Amount per Taxpayer	Difference Explained	Reference
1	ITC mismatch	Rs X	Rs Y	Annexure A	Para 3.1
2	Turnover diff	Rs X	Rs Y	Annexure B	Para 3.2

5. Prayer Clause

Request the officer to:

• Accept the explanation and drop the scrutiny (ASMT-12 acceptance)
• Alternatively, grant a personal hearing before taking any adverse action
• Not initiate Section 73/74 proceedings without affording full opportunity

6. Annexures

• Detailed reconciliation workbooks (Excel printouts)
• Tax invoices for disputed ITC
• Bank statements showing payment to suppliers
• GSTR-2A/2B vs GSTR-3B reconciliation
• E-way bill reconciliation
• Rule 42/43 reversal workings
• Any relevant correspondence with suppliers

Timeline and Procedural Checklist

Step	Action	Timeline	Form/Portal
1	Receive ASMT-10	Day 0	GST Portal > Services > User Services > View Additional Notices
2	Acknowledge receipt and assign to team member	Day 1	Internal record
3	Gather GSTR-1, 3B, 2A/2B, 9 data	Days 1-3	GST Portal downloads
4	Prepare reconciliations	Days 3-7	Excel workbooks
5	Collect supporting documents from client	Days 5-10	Tax invoices, bank statements, challans
6	Draft ASMT-11 reply with legal citations	Days 8-12	Written submission + annexures
7	Internal review (partner sign-off)	Days 12-14	Quality check
8	File ASMT-11 on portal with attachments	Day 14-15	GST Portal > ASMT-11
9	Request extension (if needed)	Before deadline	Letter to proper officer
10	Follow up for ASMT-12 order	Days 30-60	Check portal for acceptance/adverse order

Key deadline: The ASMT-10 typically grants 15 to 30 days to respond. If you need more time, file a written request for extension before the deadline expires. There is no statutory cap on extensions, but officers have discretion.

Tip: If the response deadline falls in late March and the officer is rushing to pass an order before March 31, 2026, file the reply as early as possible. A late reply gives the officer a reason to pass an ex-parte adverse order.

Appeal Process If ASMT-12 Is Adverse

If the officer is not satisfied with the ASMT-11 reply, the normal course is for the officer to initiate proceedings under Section 73 or 74 by issuing DRC-01 (show cause notice). However, if the officer proceeds directly to an adverse order — or if a DRC-07 demand order is passed following the scrutiny — the appeal route is as follows.

First Appeal: Section 107 (Appellate Authority)

• Forum: Commissioner (Appeals) — or the equivalent rank depending on the adjudicating officer
• Time limit: 3 months from the date of communication of the order (extendable by 1 month on sufficient cause)
• Pre-deposit: 10% of the disputed tax amount (for Section 73 cases); capped at Rs 25 crore for CGST and Rs 25 crore for SGST
• Form: GST APL-01 on the portal + APL-01W (grounds of appeal as a PDF attachment)
• Stay: Filing the appeal with the mandatory pre-deposit automatically stays recovery of the balance amount

Second Appeal: GSTAT (Appellate Tribunal)

• Forum: GST Appellate Tribunal — state benches are now operational in most states as of 2025-26
• Time limit: 3 months from the date of the first appellate order (extendable by 1 month)
• Pre-deposit: Additional 20% of the disputed tax (total pre-deposit including first appeal: 30%)
• Form: GST APL-05

High Court (Section 117)

• For substantial questions of law, a further appeal lies to the jurisdictional High Court
• Alternatively, a writ petition under Article 226 can be filed directly against a patently illegal or jurisdictionally void order — bypassing the appellate route where the order is a nullity (e.g., passed without jurisdiction, in violation of natural justice, or beyond limitation)

Key Procedural Defense: Natural Justice Violation

For the current wave of March 2026 notices, if the officer passes an order in haste without granting adequate opportunity to respond, this itself is a ground for setting aside the order. The Supreme Court in Automotive Tyre Manufacturers Association vs. Designated Authority (2011) and numerous GST-era High Court decisions have consistently held that an order passed without affording reasonable opportunity of hearing is liable to be set aside. An officer who receives your ASMT-11 on March 25 and passes an adverse order on March 28 without granting a personal hearing has violated natural justice — and the appellate authority will take note.

Practical Tips for Bulk Notice Handling in March 2026

1. Triage by Risk and Deadline

Not all ASMT-10 notices warrant the same level of effort. Categorize by:

• Immediate action (respond first): Demand amount exceeding Rs 10 lakh, notices with reply deadlines within 7 days, or discrepancies that cannot be easily reconciled
• Standard priority: Discrepancies largely explainable with available data, demand between Rs 1-10 lakh
• Lower priority: Small amounts (below Rs 1 lakh), obvious data-matching errors that can be responded to with a standard reconciliation

2. Build Standardized Response Templates

For the five common discrepancy types covered above, prepare template response paragraphs with placeholders for client-specific data. This cuts drafting time by 60-70% while maintaining quality. Standardize your reconciliation Excel formats so any team member can populate them.

3. Download All GSTR Data in Bulk

Before drafting individual replies, download GSTR-1, GSTR-3B, GSTR-2A, GSTR-2B, and GSTR-9 for all affected clients for FY 2021-22. Having the data ready avoids repeated portal visits during the crunch period. The GST portal allows bulk downloads — use this feature.

4. Request Extensions Proactively

If you cannot respond within the stated deadline, file extension requests immediately. A reasonable request (15-30 additional days) is usually granted. The key is to file it before the original deadline expires — a request filed after the deadline is at the officer's absolute discretion.

5. Track Every Notice Centrally

Maintain a master tracker with: client name, GSTIN, ASMT-10 reference, date received, discrepancy type, amount, deadline, assigned team member, and status. In a high-volume month, missing a single deadline can escalate to demand proceedings that could have been avoided.

6. Raise Limitation Objections Early

For any ASMT-10 that covers periods where the limitation may be questionable (e.g., FY 2019-20 in states where the extension has expired), raise the limitation objection as the first point in the ASMT-11 reply. Even if the officer overrules it, it preserves the argument for appeal.

7. Do Not Ignore ASMT-10

Some CAs treat scrutiny notices as less urgent than demand notices. This is a mistake. An unanswered ASMT-10 gives the officer grounds to initiate Section 73/74 proceedings without the taxpayer having had the benefit of the pre-demand explanation stage. Always respond, even if the response is brief and seeks additional time.

8. Coordinate with Suppliers

For ITC mismatch cases, proactively reach out to the supplier whose non-filing caused the mismatch. If the supplier files or amends their GSTR-1 before your reply deadline, the mismatch may resolve itself — and your ASMT-11 can simply point to the updated GSTR-2A/2B.

Limitation Period Quick Reference

Financial Year	GSTR-9 Due Date	Limitation Expiry (Section 73)	Status as of March 2026
FY 2019-20	Dec 31, 2020	Dec 31, 2023 (extended in some states)	Expired in most jurisdictions
FY 2020-21	Dec 31, 2021	Dec 31, 2024 (extended in some states)	Expired in most jurisdictions
FY 2021-22	Dec 31, 2022	March 31, 2026	Current surge — deadline imminent
FY 2022-23	Dec 31, 2023	March 31, 2027	Next year's wave
FY 2023-24	Dec 31, 2024	March 31, 2028	Future

For clients with no pending ASMT-10 for FY 2021-22, April 1, 2026 marks a clean cut — the department loses jurisdiction to scrutinize returns for that year under Section 73. Use this timeline to reassure clients who are concerned about old periods.

How TaxNoticeAI Helps CAs Handle the ASMT-10 Surge

The March 2026 notice rush is a volume problem as much as a complexity problem. Each ASMT-10 requires reading the notice, identifying the specific discrepancies, pulling the relevant GSTR data, preparing reconciliations, researching applicable case law, and drafting a structured reply. Multiply that by 20 or 50 clients, and the arithmetic becomes unworkable without automation.

TaxNoticeAI is built for exactly this scenario:

• Upload the ASMT-10 PDF and the system automatically extracts the discrepancy type, amounts, and periods under scrutiny using OCR and AI classification.
• Automated legal research against a curated corpus of 3,100+ GST and Income Tax legal documents — including High Court decisions, Tribunal orders, CBIC circulars, and advance rulings relevant to each discrepancy type.
• Structured ASMT-11 draft generation with proper legal citations, reconciliation framework, and prayer clause — tailored to the specific allegations in the notice, not a generic template.
• Procedural defect detection — the system flags limitation issues, jurisdiction problems, and missing pre-notice intimations automatically.
• Bulk processing — upload multiple notices and process them in parallel, with each response individually tailored.

The AI does not replace your professional judgment. It eliminates the 3-5 hours of manual research and formatting per notice so you can focus on strategy, client communication, and quality review. In a month where you may receive more ASMT-10 notices than you normally handle in an entire quarter, that time savings is the difference between meeting deadlines and missing them.

Start processing your ASMT-10 notices today at taxnoticeai.app — no credit card required, first three notices free.

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Disclaimer: This article is for informational purposes only and does not constitute legal or tax advice. The information presented is based on the CGST Act, 2017, CGST Rules, 2017, and judicial decisions available as of March 2026. Tax laws and interpretations are subject to change. Always consult a qualified Chartered Accountant or tax professional for advice specific to your situation. TaxNoticeAI provides AI-generated drafts for professional review — all outputs should be verified by a qualified professional before submission to any tax authority.