GST: GSTR-3B due 20th of every monthIncome Tax: ITR-U window open for AY 2023-24Finance Act 2025 — new slab rates effective AY 2025-26MCA: DIR-3 KYC due 30 SepCBIC Notification 09/2025-CT — late fee waiverAdvance Tax — Q3 instalment due 15 DecTDS return Q2 due 31 OctGST: GSTR-3B due 20th of every monthIncome Tax: ITR-U window open for AY 2023-24Finance Act 2025 — new slab rates effective AY 2025-26MCA: DIR-3 KYC due 30 SepCBIC Notification 09/2025-CT — late fee waiverAdvance Tax — Q3 instalment due 15 DecTDS return Q2 due 31 Oct

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