April 2026 is the first month of FY 2026-27, making it critical for businesses to stay on top of GST compliance from Day 1. Missing a deadline means late fees under Section 47 of the CGST Act — ₹50/day for nil returns and ₹100/day (₹50 CGST + ₹50 SGST) for returns with tax liability, capped at ₹10,000.
This calendar covers every GST filing deadline in April 2026, organized by date. Bookmark this page and check back monthly — we publish an updated calendar every month.
April 2026 GST Due Dates — At a Glance
| Due Date | Return/Form | Period | Who Must File |
|---|---|---|---|
| April 7, 2026 | TDS Payment (Income Tax) | March 2026 | All TDS deductors |
| April 10, 2026 | GSTR-7 (TDS under GST) | March 2026 | GST TDS deductors (govt bodies, PSUs) |
| April 10, 2026 | GSTR-8 (TCS under GST) | March 2026 | E-commerce operators (Amazon, Flipkart, etc.) |
| April 11, 2026 | GSTR-1 (Monthly) | March 2026 | Regular taxpayers (turnover > ₹5 Cr or opted for monthly) |
| April 13, 2026 | GSTR-1 (Quarterly — QRMP) | Jan–Mar 2026 (Q4) | QRMP scheme taxpayers (turnover ≤ ₹5 Cr) |
| April 13, 2026 | IFF (Invoice Furnishing Facility) | March 2026 | QRMP taxpayers (optional, for B2B invoices) |
| April 13, 2026 | GSTR-5 (Non-Resident) | March 2026 | Non-resident taxable persons |
| April 13, 2026 | GSTR-6 (ISD) | March 2026 | Input Service Distributors |
| April 18, 2026 | CMP-08 (Composition Dealers) | Jan–Mar 2026 (Q4) | Composition scheme taxpayers |
| April 20, 2026 | GSTR-3B (Monthly) | March 2026 | All regular taxpayers (monthly filers) |
| April 22, 2026 | GSTR-3B (Quarterly — QRMP) | Jan–Mar 2026 (Q4) | QRMP taxpayers (States: Chhattisgarh, MP, Gujarat, Maharashtra, etc.) |
| April 24, 2026 | GSTR-3B (Quarterly — QRMP) | Jan–Mar 2026 (Q4) | QRMP taxpayers (remaining states) |
| April 28, 2026 | GSTR-11 | March 2026 | UIN holders (embassies, UN bodies) |
| April 30, 2026 | GSTR-9 / GSTR-9C (Annual Return) | FY 2024-25 | All regular taxpayers (if extended to April 30) |
Key Deadlines Explained
April 7 — TDS Payment for March 2026
All employers and businesses who deducted TDS during March 2026 must deposit it with the government by April 7. This covers salary TDS (Section 192), contractor TDS (Section 194C), rent TDS (Section 194I), and all other TDS categories. Use the TDS Interest Calculator to check penalties if you miss this date.
April 11 — GSTR-1 (Monthly Filers)
If your turnover exceeds ₹5 crore or you've opted for monthly filing, your March 2026 GSTR-1 (outward supplies) is due by April 11. File directly from TallyPrime using the built-in GSTR-1 direct upload feature to avoid manual data entry.
April 13 — GSTR-1 Quarterly (QRMP Scheme)
If you're on the QRMP scheme (quarterly filing, monthly payment), your January–March 2026 quarter GSTR-1 is due by April 13. This is also the last date for IFF filing for March 2026 B2B invoices.
April 18 — CMP-08 (Composition Scheme)
Composition dealers must file their quarterly CMP-08 statement for the January–March 2026 quarter. This is a simple return showing total turnover and tax payable. Remember: composition dealers cannot claim input tax credit and must pay tax at fixed rates (1% for manufacturers, 5% for restaurants, 6% for services).
April 20 — GSTR-3B (Monthly Filers) ⚠️ CRITICAL
The most important deadline of the month. All regular taxpayers filing monthly must submit GSTR-3B for March 2026 by April 20. This is where you pay your actual GST liability after adjusting Input Tax Credit (ITC). Late filing attracts:
- Late fee: ₹50/day (₹25 CGST + ₹25 SGST) — max ₹10,000
- Nil return late fee: ₹20/day (₹10 CGST + ₹10 SGST) — max ₹5,000
- Interest: 18% per annum on outstanding tax from the due date
Use our GST Interest Calculator to estimate penalties before they add up.
April 22/24 — GSTR-3B (Quarterly — QRMP)
QRMP taxpayers file GSTR-3B quarterly. The due date depends on your state:
- April 22: Chhattisgarh, Madhya Pradesh, Gujarat, Maharashtra, Karnataka, Goa, Kerala, Tamil Nadu, Telangana, Andhra Pradesh, Daman & Diu, Dadra & Nagar Haveli, Puducherry, Andaman & Nicobar, Lakshadweep
- April 24: All remaining states and union territories
Mumbai businesses: Your deadline is April 22.
How to File GST Returns from TallyPrime
TallyPrime makes GST compliance significantly easier with built-in return preparation. Here's the workflow:
- Verify your data: Go to Gateway of Tally → Display → Statutory Reports → GST → GSTR-1 / GSTR-3B
- Reconcile mismatches: Check for HSN code errors, missing GSTINs, and rate mismatches
- Export JSON: TallyPrime generates the GST portal-compatible JSON file
- Upload to GST Portal: Use the direct upload feature or upload manually at gst.gov.in
- Verify and file: Cross-check on the portal, then submit using DSC or EVC
Late Fee and Penalty Quick Reference
| Return | Late Fee (Per Day) | Max Late Fee | Interest |
|---|---|---|---|
| GSTR-1 | ₹50 (₹25+₹25) | ₹10,000 | N/A |
| GSTR-3B (with tax) | ₹50 (₹25+₹25) | ₹10,000 | 18% p.a. |
| GSTR-3B (nil) | ₹20 (₹10+₹10) | ₹5,000 | N/A |
| GSTR-9 (Annual) | ₹200 (₹100+₹100) | 0.5% of turnover | N/A |
FY 2026-27 — What Changed This April?
Starting April 1, 2026, businesses must update several configurations in TallyPrime:
- New invoice series: Start fresh numbering sequences. See our complete invoice series setup guide.
- Financial year creation: Create FY 2026-27 in TallyPrime. Follow our FY setup checklist.
- Opening balance verification: Ensure closing balances from FY 2025-26 carry forward correctly.
- E-invoice threshold: E-invoicing remains mandatory for businesses with turnover > ₹5 crore. If you're nearing this threshold, set up e-invoicing now.
Need help with GST compliance? Mark IT Solutions is Mumbai's trusted 5-Star Tally Partner with 20+ years of experience. We help businesses file returns on time, reconcile mismatches, and avoid penalties. Call us at 022 6199 2222 or request a consultation today.
