To know more on linking PAN with Aadhaar, visit https://uidai.gov.in/282-faqs/your-aadhaar/aadhaar-letter/1884-how-do-i-link-pan-with-aadhaar.html
To check the status of the linkage of your PAN with Aadhaar, visit https://www1.incometaxindiaefiling.gov.in/e-FilingGS/Services/AadhaarPreloginStatus.html.
Please ignore if already linked.