Explanation
This is a critical point for compliance: the IT Act 2025 applies to income earned on or after 1 April 2026 (Tax Year 2026-27 onwards). Income earned in FY 2025-26 (April 2025 to March 2026) is assessed under the IT Act 1961 using the old concept of AY 2026-27. The return is filed using the old ITR forms (ITR-1, ITR-2, etc.) by 31 July 2026 (non-audit) or 31 October 2026 (audit). Old section numbers (80C, 194J, etc.) apply. The new forms (ITR forms under IT Act 2025) apply from Tax Year 2026-27 returns filed in 2027.