The complete
IT Act 2025, structured.
536 sections. Every deduction, every TDS provision, every capital-gains rule - mapped against the 1961 Act, linked to rules, circulars and case law. Free. Public. Indexable.
Browse 517+ sections.
Section Mapper 1961 ⟷ 2025.
Bidirectional. Sub-second. Free and public. Backed by our live tax-law API.
Six things every CA looks up first.
Form rename hub.
CBDT cut 399 forms down to 190 under the IT Rules, 2026. Here's what your old form is now called.
Everything CAs ask about the IT Act 2025.
What is the Income Tax Act 2025?▾
The Income Tax Act 2025 is a comprehensive rewrite of the Income Tax Act 1961, passed by Parliament and effective from April 1, 2026. It consolidates 819 sections into 536 cleaner, better-structured sections in plain language.
Did Section 80C change under the IT Act 2025?▾
The deduction is now under Section 123 of the IT Act 2025, but the ₹1,50,000 limit and eligible instruments (PPF, ELSS, LIC, NSC, home loan principal, tuition fees) are unchanged. Available only under the old regime.
Is my ITR filing process different under IT Act 2025?▾
The substance is the same but form names and section numbers have changed. ITR-1 is now Form 1, Form 16 is now Form 130, Form 26AS is now Form 168 (Tax Passbook). The Income Tax Return filing deadline (July 31 / October 31) remains the same.
What is the new tax regime default under IT Act 2025?▾
Under IT Act 2025, the new tax regime (nil tax up to ₹12 lakh via Section 157 rebate) is the default regime. Taxpayers who want the old regime deductions must opt in when filing their return.
Where can I find the official text of IT Act 2025?▾
The official text is available at incometaxindia.gov.in and e-gazette.nic.in. ThynkTax provides a free, structured, searchable reference of all 536 sections with plain-language summaries and a live API.