📅 7 Oct – TDS Payment
Pay Income Tax TDS deducted in September 2025. Avoid interest and penalties.
📅 10 Oct – GST TDS & TCS Payment
Deposit GST TDS (if you're a govt/notified entity) and GST TCS (if you're an e-commerce operator) for September 2025.
📅 11 Oct – GSTR-1 (Monthly)
File GSTR-1 for September – shows your sales invoices. For monthly filers.
📅 13 Oct – GSTR-1 (Quarterly – IFF)
Upload invoices for September using IFF (only if you're under QRMP scheme).
📅 14 Oct – ADT-1 Filing
File ADT-1 to inform MCA about the appointment of your auditor (within 15 days of AGM).
📅 15 Oct – Multiple Tasks
- TCS Return (Form 27EQ) for Q2 (July–Sept)
- DIR-3 KYC / WEB – Complete Director KYC (mandatory)
- EPF & ESI – Deposit for September

📅 18 Oct – CMP-08 Filing
For Composition dealers – file CMP-08 for Q2 (Jul–Sept) with tax payment.
📅 20 Oct – GSTR-3B (Monthly)
File GSTR-3B for September – summary return for GST payments.
📅 22/24 Oct – GSTR-3B (Quarterly)
QRMP filers must file GSTR-3B for Q2:
- 22 Oct: For Group A states
- 24 Oct: For Group B states
📅 29 Oct – AOC-4 Filing
File AOC-4 to submit audited financial statements to MCA for FY 2024–25.
📅 30 Oct – Multiple Tasks
- Form 8 (LLP) – Annual Statement of Account & Solvency for FY 2024–25
- 26QB/C/D – File TDS returns for property-related payments
- 27D – Issue TCS certificate to buyers
📅 31 Oct – Major Compliance Day
- TDS Returns (24Q/26Q/27Q) for Q2
- Tax Audit Report (Form 3CA/3CB/3CD) submission
ITR Filing for audit cases (businesses/professionals)
Happy Reading...
Best Regards,
CA Syed Nayabe Rasool
Practicing Chartered Accountant.