November stacks the extended tax returns and the 2025-26 GST clean-up deadline on top of monthly filings: TDS on the 7th, GSTR-1 on the 11th, PF/ESIC and Form 131 certificates on the 15th, GSTR-3B on the 20th, audit-case returns on the 21st, MGT-7 on the 29th and transfer-pricing returns on the 30th.
Advance tax is paid in four cumulative instalments: 15% by 15 June, 45% by 15 September, 75% by 15 December and 100% by 15 March, if the liability after TDS exceeds ₹10,000.
Credit needs a valid invoice, actual receipt, supplier filing and payment, not a blocked item under s.17(5), and payment to the supplier within 180 days.
Under section 172 of the Income-tax Act, 2025 and Rule 85 of the 2026 Rules, the accountant's transfer-pricing report becomes Form 48. Form 3CEB still applies up to 2025-26 (AY 2026-27); Form 48 applies from Tax Year 2026-27.
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