GST Table 18 Optional in GSTR-9 (Notification No. 05/2026-Central Tax): Complete Compliance Guide for CAs & CFOs
Statutory Framework & Legal Background
Under the Central Goods and Services Tax (CGST) Act, 2017, annual compliance requires registered taxpayers to furnish an annual return in Form GSTR-9 under Section 44 read with Rule 80 of the CGST Rules, 2017. Historically, reporting detailed inward supplies on an HSN basis in Table 18 of GSTR-9 demanded extensive data reconciliation between purchase registers, input tax credit (ITC) ledgers, and electronic credit ledger accounts maintained under Section 35 and Section 36.
Notification No. 05/2026–Central Tax, dated 26 October 2026, amends the reporting requirements by exempting taxpayers from the mandatory disclosure of Table 18 (HSN-wise summary of inward supplies) effective from the financial year 2025-26 onwards. While this measure reduces compliance friction, statutory liabilities regarding correct ITC availment under Section 16 and matching provisions under Section 37 and Section 38 remain unaltered. Non-compliance with core annual return filing timelines under Section 44 attracts late fees under Section 47, quantified at INR 100 per day under CGST and matching SGST/UTGST acts, capped at a maximum of 0.25% of the taxpayer's turnover in the state or union territory.
Scope of Expansion & Applicability Matrix
The relaxation granted under Notification No. 05/2026–Central Tax applies universally to all regular taxpayers required to file Form GSTR-9 for FY 2025-26 and subsequent financial years. The applicability matrix covers standard business entities, manufacturing units, service providers, and traders registered under regular GST schemes.
Key parameters determining operational relief include:
- Taxpayer Categories Covered: All regular B2B and B2C registered entities filing Form GSTR-9.
- Exclusions: Composition taxpayers filing GSTR-9A and E-commerce operators filing GSTR-9B retain their respective distinct annual return frameworks.
- Filing Thresholds: Aggregate turnover thresholds mandating annual return filing under Section 44 continue to govern filing obligations, while specific data fields within the form stand relaxed.
- ITC Reconciliations: Relaxation of Table 18 does not dilute the mandatory reconciliation required for Table 8 (ITC declared vs. ITC availed) or outward supply disclosures in Table 17.
Step-by-Step Operational & ERP Workflow
Adapting enterprise resource planning (ERP) systems and internal audit workflows to align with the revised GSTR-9 specifications requires structured implementation steps:
- Configuration Update: Update enterprise SAP, Oracle, Tally, or custom billing systems to bypass mandatory validation rules previously tied to Table 18 inward HSN fields for FY 2025-26 returns.
- Purchase Register Isolation: Isolate inward supply HSN mapping parameters so that while general ledger accounts capture tax codes, mandatory line-by-line inward HSN tagging for annual reporting is designated as non-mandatory.
- Internal Audit Verification: Direct internal audit teams to verify that purchase invoices continue to comply with mandatory tax invoice rules under Section 31, notwithstanding the removal of annual summary reporting in Table 18.
- Reconciliation Matrix Alignment: Ensure that input tax credit claims are substantiated through GSTR-2B matching protocols rather than relying on annual HSN aggregations.
- Drafting and Review: Conduct final review of GSTR-9 drafts for FY 2025-26, ensuring Tables 1 through 17 are populated accurately before final digital signature certificate (DSC) authentication.
Comparative Analysis: Previous Practice vs New Mandate
| Compliance Parameter | Previous Practice (Up to FY 2024-25) | New Mandate (From FY 2025-26 Onwards) |
|---|---|---|
| Table 18 Requirement | Mandatory reporting of HSN-wise summary of inward supplies. | Made optional for all taxpayers filing Form GSTR-9. |
| ERP Data Extraction Burden | High requirement to map and extract inward HSN codes at invoice line-item levels. | Reduced data extraction overhead for purchase transactions. |
| ITC Substantiation | Cross-verified via Table 18 inward HSN aggregates alongside GSTR-2B. | Verified primarily through GSTR-2B and standard purchase registers. |
| Penalty Exposure | Deficiencies or mismatches in Table 18 led to departmental notices and scrutiny. | Exemption from Table 18 eliminates mismatch litigation on inward HSN data. |
Action Plan Checklist for Finance & Audit Teams
To ensure seamless transition and robust internal control management under the updated annual return framework, finance and tax departments must execute the following 5-point checklist:
- ✔ Review Notification Circulars: Circulate Notification No. 05/2026–Central Tax among tax filing teams and external statutory auditors.
- ✔ Audit ERP Parameters: Confirm that IT and software vendors have disabled mandatory validation checks for Table 18 in annual return utility tools.
- ✔ Validate ITC Integrity: Maintain rigorous validation of input tax credit claims under Section 16 independent of annual HSN inward summaries.
- ✔ Update Compliance Manuals: Revise standard operating procedures (SOPs) for annual GST return compilation for FY 2025-26.
- ✔ Sign-off Protocols: Establish multi-level review sign-offs for GSTR-9 filings focusing on outward supplies (Table 17) and tax liability reconciliations.