According to this NSE circular, your PAN must be connected to your Aadhaar by March 31, 2022.

PANs that are not linked to Aadhaar will be regarded as invalid for trading in the Securities Market as of April 1, 2022. As a result, it's best to get the PAN - Aadhaar seeding done before the deadline.

There are two ways to link your Aadhaar to your PAN if you haven't already:
- Online from the Income-tax portal
- Alternatively, you can send an SMS to 567678 or 56161 to link or check the status:

Type a message in the following format:

UIDPAN <12 digit Aadhaar> <10 digit PAN>

Send the message to either 567678 or 56161 from your registered mobile number

If the information provided is correct, the Aadhaar will be linked to PAN successfully