GST Notices on the Rise: Key Issues, Common Mismatches and Major Compliance Areas Taxpayers Must Review
During August 2026, the GST Department issued a significant number of notices covering different financial years and involving a wide range of issues[cite: 3]. These notices were not confined to one particular type of default[cite: 3]. They covered matters such as ITC mismatches, ineligible credit, differences in turnover, wrong GST classification or rate, exemption claims, Reverse Charge Mechanism, post-sale discounts, credit notes, SEZ supplies, export refunds, and transactions between different GST registrations[cite: 3].
The recent wave of notices provides an important indication of the areas presently receiving greater departmental scrutiny[cite: 3]. Below, we discuss the major issues on which GST notices are being issued, the nature of discrepancies identified by the Department, and practical examples to understand how such issues arise[cite: 3].
What Kind of GST Notice Can a Taxpayer Receive?
Before examining individual issues, it is important to understand the nature of the communication received from the GST Department[cite: 3]:
FORM GST ASMT-10
A scrutiny notice issued under Section 61 read with Rule 99[cite: 3]. The Proper Officer points out discrepancies during return scrutiny and requests explanations[cite: 3].
FORM GST DRC-01B
A system-generated intimation issued when tax liability declared in GSTR-1/IFF exceeds liability discharged through GSTR-3B beyond prescribed limits[cite: 3].
FORM GST DRC-01C
System-generated intimation relating to differences between Input Tax Credit (ITC) claimed in GSTR-3B and available ITC in GSTR-2B beyond parameters[cite: 3].
FORM GST DRC-01
Summary of a formal show-cause notice in demand proceedings (Section 73/74 up to FY 2023-24; governed by Section 74A from FY 2024-25 onwards)[cite: 3].
Top 10 High-Scrutiny Areas & Common Discrepancies
1 GSTR-1, GSTR-3B, GSTR-9 and Books of Account Not Matching
Reconciliation of turnover and output tax is a primary area of departmental scrutiny[cite: 3]. The Department cross-verifies financial statements, trial balances, sales registers, e-invoices, and e-way bill data[cite: 3]. Differences do not automatically mean suppressed turnover; they may stem from credit notes, advance receipts, non-GST income, or timing adjustments[cite: 3].
GSTR-1 Turnover: ₹9.70 crore
Difference: ₹30 lakh[cite: 3]
Action: Provide a detailed reconciliation showing if the ₹30 lakh represents non-GST income, accounting adjustments, or period timing differences[cite: 3].
2 ITC Claimed in GSTR-3B Exceeding GSTR-2A/GSTR-2B
Comparing GSTR-3B ITC with supplier-reported data in GSTR-2A/2B is continuously scrutinised[cite: 3]. Mismatches often occur due to delayed filing by suppliers, wrong GSTIN entries, debit notes, ISD credits, or imports[cite: 3].
GSTR-2A/2B Available: ₹11,20,000
Difference: ₹80,000[cite: 3]
Action: Identify individual invoices causing the difference and verify if statutory conditions under Section 16 were fulfilled[cite: 3].
3 ITC From Cancelled, Non-Filing or Non-Compliant Suppliers
Where ITC is claimed on invoices from suppliers whose registrations are cancelled retrospectively or who failed to discharge tax, the Department questions purchase genuineness[cite: 3]. Recipient documentation is critical[cite: 3].
4 Ineligible ITC and Failure to Reverse Common Credit
Invoices appearing in GSTR-2B are not automatically admissible[cite: 3]. Credit may be blocked under Section 17(5), or require proportionate reversal under Rules 42 and 43 if common inputs/capital goods are used for both taxable and exempt supplies[cite: 3].
5 Wrong GST Rate, HSN Classification or Exemption
Notices frequently dispute tax treatment—alleging incorrect HSN/SAC codes, lower tax payment rates, improper exemption claims, or incorrect composite/mixed supply classification[cite: 3].
6 Post-Sale Discounts, Dealer Incentives and Credit Notes
Year-end or volume discounts seeking output tax reduction are scrutinized to ensure compliance with statutory conditions governing commercial vs. GST credit notes[cite: 3].
7 Reverse Charge Mechanism (RCM) Liability Not Discharged
Departmental scrutiny includes examining expense ledgers (legal fees, director services, GTA, sponsorship, service imports) to identify un-discharged RCM liabilities[cite: 3].
8 Distinct Person Transactions, ISD and Cross-Charge
Establishments under the same PAN in different States are distinct persons[cite: 3]. Scrutiny arises if head office expenses or common input services are consumed by branches without proper ISD distribution or cross-charge invoicing[cite: 3].
9 SEZ Supplies, Exports and Refund Claims
Zero-rated supply documentation is rigorously verified, including LUT/Bond validity, SEZ endorsements, shipping bills, and foreign inward remittance receipts[cite: 3].
10 E-Way Bill and Goods-in-Transit Violations
Goods intercepted during movement with invalid, missing, or expired e-way bills trigger immediate detention and penalty proceedings under Section 129[cite: 3].
Why GST Notices Are Increasingly Data-Driven
GST administration relies on automated data triangulation across multiple integrated databases[cite: 3]:
What Should a Taxpayer Check Immediately After Receiving a Notice?
Follow this structured 10-step protocol upon receiving any GST notice or communication[cite: 3]:
| Step | Action Item |
|---|---|
| 01 | Identify the exact notice/form received (ASMT-10, DRC-01B/C, DRC-01)[cite: 3]. |
| 02 | Determine the financial year and exact tax period involved[cite: 3]. |
| 03 | Pinpoint the precise discrepancy or allegation raised by the officer[cite: 3]. |
| 04 | Classify if the issue is factual, accounting-based, documentary, or legal[cite: 3]. |
| 05 | Reconcile filed GST returns directly with books of account and trial balances[cite: 3]. |
| 06 | Gather supporting evidence: invoices, contracts, e-way bills, and payment proofs[cite: 3]. |
| 07 | Verify whether taxability, classification, or exemption applicability is disputed[cite: 3]. |
| 08 | Re-calculate tax, interest, and statutory penalty computations[cite: 3]. |
| 09 | Confirm whether the correct legal provision/section was invoked for that FY[cite: 3]. |
| 10 | Submit an allegation-wise reply backed by clear documentary evidence[cite: 3]. |
Conclusion: Proactive Review vs. Post-Notice Defense
The current GST environment shows that taxpayers must look beyond mere monthly filing compliance[cite: 3]. Discrepancies identified by the system should be analyzed and reconciled before accepting them as tax liabilities[cite: 3]. Mismatches often arise from timing differences, accounting treatments, or vendor reporting errors rather than actual short-payments[cite: 3].
Maintaining transaction-level documentation, monthly return reconciliations, and periodic internal reviews provides the strongest defense against departmental notices[cite: 3].