Log in to your IRCTC account
Go to the My Profile section
Select Aadhaar KYC or Authenticate User
Enter your Aadhaar number
Verify your mobile number linked with Aadhaar
Enter the OTP received on your Aadhaar-linked mobile number
Submit the OTP for verification
Wait for the Aadhaar linking confirmation
Check your profile to confirm Aadhaar is linked