Here is how you can check whether your PAN is linked with Aadhaar

The Central Board of Direct Taxes (CBDT) has made it mandatory to link the Permanent Account Number with Aadhaar by March 31, 2020. Users who fail to link Aadhaar card with PAN need to forgo their PAN and all the transactions would be halted.

However, the CBDT has provided the link to check the status of Aadhaar and PAN card link card status. You can check PAN-Aadhaar linking status on the Income Tax India website. Click on 'Link Aadhaar' and then, click on 'Click here', which is above the section where you fill your PAN and Aadhaar details. The new webpage will ask you for your PAN and Aadhaar number. Fill in the details and click on 'View Link Aadhaar status'. If your PAN-Aadhaar is linked, the screen should show a confirmation message with the last four digits of your Aadhaar number.

Otherwise, here is the direct link to check your status,

The citizens who are yet to link the PAN with Aadhaar can do it in two ways either through SMS or by visiting the Income Tax website.