<h1>Agricultural extension project notification under income-tax rules sets approval conditions, duration limits, and compliance requirements for tax benefits.</h1> Form 21 is the prescribed income-tax notification form for an approved agricultural extension project under Section 47(1)(a) of the Income-tax Act, 2025, issued after approval under Rule 37 and published in the Official Gazette. It notifies the project, specifies the approved tax year(s), and sets out the terms, conditions, duration, expenditure limits, and beneficiary charges. The form records the applicant's particulars, project purpose, commencement date, approved period, estimated expenditure, and other conditions attached to approval.