There are several ways to link your PAN and Aadhaar cards like income tax e-filling websites, manual linking by filling up a form, etc. However, the easiest way to link the cards is by sending SMS to PAN service providers.
Format: SMS UIDPAN <Aadhaar number><PAN number> to 567678 or 56161
For example, if your Aadhaar number is 1234567891011122 and PAN number is 12345AAAA6, send SMS to 567678 or 56161 as UIDPAN 123456789101 12345AAAA6
