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GST Updates

Practical Compliance Guide: Responding to a GST ITC Mismatch Notice — The Circular 183 Verification Checklist Every Practitioner Should Invoke

Published 18 Aug 2026· Updated 18 Aug 2026· 2 min read

Executive Summary: With the Calcutta High Court this week confirming that a GST demand based on an ITC mismatch between GSTR-3B and GSTR-2A cannot be confirmed without the department first carrying out the verification mandated by CBIC Circular No. 183/15/2022-GST, this Practical Compliance Guide sets out a standing response checklist for practitioners handling any such notice.

Step 1 — Confirm Whether the Circular 183 Verification Was Actually Carried Out

On intake of any ITC-mismatch notice or order, the first diagnostic question is whether the department obtained invoice-wise details of the ITC claimed but not reflected in GSTR-2A, and verified: (a) possession of a valid tax invoice, (b) actual receipt of the goods or services, and (c) that the value of the supply along with applicable tax was actually paid to the supplier.

Step 2 — Check Whether the Show Cause Notice Was Properly Served

Separately from the Circular 183 point, confirm whether the SCN was actually served on the client and whether the client had a genuine opportunity to respond before any ex parte order was passed.

Step 3 — Assemble the Client’s Own Invoice-Level Documentation Proactively

Firms should build a standing practice of maintaining, for every significant supplier, the underlying tax invoice, proof of receipt of goods or services, and proof of payment of the invoice value plus tax to the supplier.

Step 4 — Use the Combined Defect Where Available, But Prepare for Fresh Adjudication

Where both the Circular 183 verification defect and improper service are present, raise both grounds together for the strongest challenge. However, advise clients that a successful challenge on these procedural grounds typically results in fresh adjudication rather than a final closure of the matter.

Key Takeaways

  • CBIC Circular No. 183/15/2022-GST mandates a specific three-point verification before any ITC-mismatch demand can be confirmed.
  • Improper service of the SCN is a separate, independent ground for challenge.
  • Clients should maintain invoice-level documentation proactively, not reactively.
  • A successful procedural challenge typically leads to fresh adjudication, not final closure.
  • This checklist applies regardless of the amount involved.

Relevant Sections / Rules / Notifications

  • Section 16, CGST Act, 2017
  • Section 73, CGST Act, 2017
  • CBIC Circular No. 183/15/2022-GST, dated 27 December 2022
  • Mongal Deep Enterprise & Ors. v. State of West Bengal

Prepared by Finoscape Editorial Team — contact@finoscape.com. This article is for general informational purposes and does not constitute tax advice. Specific ITC-mismatch defences should be independently verified for each client’s facts with a qualified professional.

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