PAN-Aadhaar linking mandatory for applications before 1st Oct 2024, deadline 31st Dec 2025: The notification issued under Section 139AA(2A) of Income Tax Act, mandate that individuals who obtained a Permanent Account Number (PAN) using an Aadhaar Enrolment ID before 1st October 2024, must intimate their Aadhaar number to the Principal Director General of Income-tax (Systems) or an authorized authority. The deadline for compliance is 31st December 31, 2025. (Income tax Notification 26/2025 Dated 03/04/2025)