If your name and date of birth are the same in both documents, the Aadhaar number will be linked with the PAN number after sending SMS to the aforesaid numbers.
Users can send an SMS to 567678 or 56161 by typing UIDPAN < 12 digit Aadhaar number> < 10 digit Permanent Account Number> for this. If the linking is complete, it will show, "Aadhaar is already associated with PAN.