<h1>Linking PAN with Aadhaar online without login requires exact Aadhaar name, DOB/gender match, and Aadhaar OTP for minor name mismatches.</h1> Taxpayers can link PAN with Aadhaar on the Income Tax e filing website without logging in by submitting PAN, Aadhaar number and the name exactly as on Aadhaar; UIDAI verification confirms the link. Minor name mismatches require an Aadhaar OTP to the mobile registered with Aadhaar. Date of birth and gender must match across PAN and Aadhaar; wholly different names cause linking to fail and will prompt correction in either database. The facility is also available under Profile settings when logged in, with PAN details pre populated.