As per Sec139AA of The Income Tax Act 1961, it is mandatory to link PAN with Aadhaar by 30th September 2021, or else:
1. PAN will become inoperative and Form15G/H cannot be submitted and;
2. TDS will be deducted at 20%
To check the status of your PAN-Aadhaar linkage:
https://eportal.incometax.gov.in/iec/foservices/#/pre-login/link-aadhaar-status
To link your PAN with Aadhaar:
https://eportal.incometax.gov.in/iec/foservices/#/pre-login/bl-link-aadhaar
