Income Tax Filing Rules for AY 2026-27 and Tax Year 2026-27

Income tax filing rules explained AY 2026-27 vs Tax Year 2026-27: Key changes you must know

Taxpayers must navigate distinct filing requirements for Assessment Year (AY) 2026-27 and Tax Year 2026-27 as the government transitions to the new Income Tax Act 2025. Income earned during the financial year 2025-26 will be assessed under the existing Income Tax Act 1961 for AY 2026-27, while income for FY 2026-27 falls under the new tax regime.

Both filing obligations will be processed separately on the income tax e-filing portal, with different rules and deadlines applying to each.

Filing Returns for AY 2026-27 Under the Old Tax Act

Returns for income earned in FY 2025-26 (AY 2026-27) continue to be governed by the Income Tax Act 1961. Taxpayers can file revised returns under Section 139(5) before the end of the assessment year or before the assessment is completed, whichever comes first.

Belated returns for AY 2026-27 are allowed until December 31, 2026, under Section 139(4), though late filing fees will apply based on total income.

Updated Return (ITR-U) Provisions

The updated return provision, introduced under Section 139(8A), permits taxpayers to correct or disclose additional income even after filing the original return. This option is available within prescribed time limits but may involve additional tax liabilities and certain restrictions.

Separate Compliance for Tax Year 2026-27

Income earned during FY 2026-27 will be assessed under the new Income Tax Act 2025. Taxpayers must file returns separately for this period, following the updated rules and procedures applicable under the new law.

Understanding these distinctions is crucial for accurate compliance and timely filing as India transitions to the new tax framework.