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Navigating Goods and Services Tax is not about memorising form numbers. This structured cheat sheet is designed to simplify 90% of real‑world Goods and Services Tax work for businesses and professionals. It’s about knowing when and why each form is triggered. Mastery of Goods and Services Tax forms is what separates. Return filers from Goods and Services Tax advisors
Forms That Handle 90% of GST Compliance : Business and consultants are deal with these regularly:
REG SERIES – Registration Lifecycle
Appeals (APL Series) : APL‑01 → Appeal to Appellate Authority
Audit (ADT Series)
E‑WAY BILL (Movement of Goods)
Determines Form Applicability: In practice, everything depends on just 3 variables:
Taxpayer Type : Regular, Composition and E‑commerce, Non‑resident taxable person
Turnover
Nature of Transactions
Difference of GST returns (GSTR-1, GSTR-3B, GSTR-2A, and GSTR-2B) along with their filing dates and key characteristics. Here’s a structured breakdown:
| Return Type | Purpose | Filed By | Nature | Frequency | Due Date / Availability | Remarks |
| GSTR-1 | Statement of outward supplies (sales) made | Supplier of goods/services | Filed return | Monthly / Quarterly (QRMP) | • Monthly: 11th of next month • QRMP: 13th of month following quarter | Forms basis for recipient’s GSTR-2A/2B |
| GSTR-3B | Summary return of outward + inward supplies, ITC claim, and tax payment | All regular taxpayers | Filed return | Monthly / Quarterly (QRMP) | • Monthly: 20th of next month • QRMP: 22nd or 24th, depending on State | Liability and ITC adjusted here |
| GSTR-2A | Auto-generated statement of inward supplies (purchases) based on supplier’s GSTR-1 | Auto-populated for recipient | Read-only (Dynamic) | Real-time | Continuously updated as suppliers upload invoices | Used for reconciliation only |
| GSTR-2B | Static auto-drafted statement of ITC available for claim | Auto-generated for recipient | Read-only (Static) | Monthly | Available on 14th of every month (for previous month) | Used for ITC matching with GSTR-3B |
GSTR-1 is the return form for outward supplies under GST. It consists of multiple tables (and sub-tables) that categorize various types of transactions. Key Tables and Purpose
Table 4A – B2B Supplies (Registered – Regular) : Reports taxable sales to registered persons (other than RCM).
Table 4B – B2B Supplies Under Reverse Charge : Reports sales where GST is payable by the registered buyer under RCM.
Table 5 – B2CL (Inter-State Large Invoices) : Reports inter-state sales to unregistered persons exceeding ₹1,00,000 per invoice.
Table 6A – Exports (With/Without Payment) : Reports export invoices made with IGST or under LUT without IGST.
Table 6B – Supplies to SEZ Units/Developers : Reports supplies made to SEZ units or developers.
Table 6C – Deemed Exports : Reports transactions notified as deemed exports under GST law.
Table 7 – B2C (Others – Small Supplies) : Reports small intra-state and inter-state sales to unregistered persons.
Table 8 – Nil-Rated, Exempt & Non-GST Supplies : Reports outward supplies not liable to GST.
Table 9A – Amendments to B2B, B2CL, Exports, SEZ, Deemed Exports : Used to correct invoices of earlier tax periods.
Table 9B – Credit/Debit Notes
Registered: For notes issued to registered persons.
Unregistered: For notes issued for B2C supplies.
Table 9C – Amendments of Credit/Debit Notes : Corrects previously reported credit or debit notes.
Table 10 – Amendment of B2C (Others) : Used to correct previously reported B2C sales.
Table 11A – Advance Received (Not Invoiced Yet) : Reports advances received before issuing invoice.
Table 11B – Advance Adjustments : Adjusts advances against invoices issued during the period.
Table 11A/11B – Amendments to Advances : Corrects advance entries of previous periods.
Table 12 – HSN-Wise Summary of Supplies : Provides HSN-wise summary of taxable value and GST.
Table 13 – Summary of Documents Issued : Reports count of invoices, debit notes, and credit notes issued.
Table 14 – E-Commerce Operator Transactions : Reports supplies made through e-commerce platforms.
Table 15 – Section 9(5) Supplies : Reports supplies where GST is payable by the e-commerce operator.
Table 15A – Amendments for Section 9(5) Supplies : Corrects Section 9(5) supplies reported earlier.
The GST portal has rolled out major taxpayer-friendly upgrades that every business and tax professional should prepare for. These changes directly impact interest liability, ITC utilisation, return accuracy, and final return compliance.
The new system fundamentally changes how interest under Section 50 is calculated. New Formula
Interest = (Net Tax Liability – Minimum Cash Balance in ECL) × (Days Delayed ÷ 365) × Interest Rate
Interest will now apply ONLY on the actual shortfall, not the entire liability. If a GST taxpayer keeps money in the Electronic Cash Ledger (ECL) before the due date, it directly reduces interest. This ensures a fair, realistic, and taxpayer‑friendly computation. GST taxpayers should maintain a sufficient ECL balance before the due date to minimize interest. following are KEY CHANGES FROM JANUARY 2026
The system auto-calculates the minimum interest based on delay. Downward editing is not allowed (prevents under-reporting). and upward editing is allowed if self-assessment requires it. Also, taxpayer responsibility continues; self-assessment is still mandatory.
The table auto-fills using Document dates from GSTR‑1 / 1A / IFF and also Helps us Correctly map previous-period supplies and Align with Section 50 interest provisions and reduces mismatches between GSTR‑1 and GSTR‑3B.
New Sequence Rules : After exhausting IGST credit, taxpayers may use CGST and SGST in any order. Increased liquidity and planning flexibility. and Removes earlier rigid utilisation hierarchy.
For cancelled taxpayers: Delayed filing of final GSTR‑3B (for the cancellation period) and interest now collected through GSTR‑10. This closes loopholes and ensures consistent interest recovery.
| Change | Effective From |
|---|---|
| New interest rules | January 2026 tax period |
| Auto‑population of interest | GSTR‑3B of February 2026 onwards |
Keep your ECL funded before the due date. Even a small balance can significantly reduce interest liability under the minimum cash balance method.
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