how to unlink pan card from aadhar card

Generally, there is no direct online mechanism to "unlink" or delink an Aadhaar card from a PAN card once they have been successfully linked, as it is a mandatory requirement for Indian taxpayers. However, if the linking was done by mistake (e.g., using a wrong Aadhaar number), you would need to contact the Income Tax Department's e-filing portal support or the respective Nodal Officer/Jurisdictional Assessing Officer for assistance with your specific case. The process requires official intervention and documentation.