16/03/2026
📢 GST Portal Advisory: New Step Added While Filing GSTR-3B (2026 Update)
The GST Network (GSTN) has introduced a new system-driven step and validations while filing GSTR-3B to improve accuracy, interest calculation, and tax liability reporting. Here is a clear professional summary you can use for clients or advisory circulation:
✅ Key Advisory — New Step in GSTR-3B Filing
👉 Before filing GSTR-3B, taxpayers must now review additional system-generated details on the GST portal.
🔹 1. Mandatory Review of Auto-Generated Liability & Records
A new verification step requires taxpayers to check system-generated data such as:
Auto-populated tax liability breakup
Past-period invoices reported in GSTR-1 / IFF
IMS (Invoice Management System) rejected records
Tax liability is now mapped based on document date, not only return period
🔹 2. System-Computed Interest (New Validation Step)
From January 2026 tax period onwards:
Interest is auto-calculated by GST portal
Displayed in Table 5.1 of GSTR-3B
Amount becomes non-editable downward
Taxpayer can only increase if required
Interest calculation now considers minimum cash balance in Electronic Cash Ledger (ECL).
👉 This step must be reviewed before final submission.
🔹 3. Auto-Populated “Tax Liability Breakup” Table
New portal functionality automatically fills liability details using:
GSTR-1 / GSTR-1A data
IFF filings
Earlier period invoices paid in current return
This ensures correct period-wise tax and interest computation
🔹 4. New ITC Utilisation Flexibility
After exhausting IGST ITC:
✅ CGST & SGST ITC can now be used in any order for IGST payment.
🔹 5. Additional Confirmation Step (Portal Advisory)
GSTN has advised taxpayers to carefully confirm the “Tax Liability Breakup, As Applicable” section to avoid incorrect interest or filing issues.
