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Income-tax Act 2025 Transition: AY 2026-27 and Tax Year 2026-27 Explained

The Income-tax Act, 2025 came into effect on 1 April 2026, replacing the Income-tax Act, 1961. However, this does not mean that every return, notice.

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01 · FROM THE GUIDE

Overview

Income-tax Act 2025 Transition: AY 2026-27 and Tax Year 2026-27 Explained

The Income-tax Act, 2025 came into effect on 1 April 2026, replacing the Income-tax Act, 1961. However, this does not mean that every return, notice, correction or tax.

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Transition at a Glance

Particular | AY 2026-27 | Tax Year 2026-27

Income period | 1 April 2025 to 31 March 2026 | 1 April 2026 to 31 March 2027

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What Changed on 1 April 2026?

The Income-tax Act, 1961 was repealed with effect from 1 April 2026 and replaced by the Income-tax Act, 2025.

The new Act simplifies the structure and language of the law. One of the most visible changes is the replacement of the terms “Previous Year” and “Assessment Year” with a.

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04 · FROM THE GUIDE

For example

Income earned between 1 April 2026 and 31 March 2027 belongs to Tax Year 2026-27.

The return for that Tax Year will be filed after 31 March 2027.

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Assessment Year 2026-27

AY 2026-27 relates to income earned during FY 2025-26, from 1 April 2025 to 31 March 2026.

Because the income period began before the new Act came into force, it continues to be governed by the Income-tax Act, 1961.

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Therefore

Use the ITR forms prescribed under the old Act;

Select AY 2026-27 on the e-Filing portal;

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Tax Year 2026-27

TY 2026-27 covers income earned from 1 April 2026 to 31 March 2027.

It is governed by the Income-tax Act, 2025. During this period, taxpayers and businesses must use the new provisions for matters such as:

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During 2026, a taxpayer may be

Filing an ITR for AY 2026-27 under the old Act; and

Paying advance tax or receiving salary subject to TDS for TY 2026-27 under the new Act.

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