Open the IRCTC website or app
Click on Login
Enter your registered mobile number or email ID
Check the username field if it is already saved in your browser or app
Use the Forgot User ID option if available
Enter your registered mobile number or email ID
Verify with OTP if prompted
Receive your IRCTC User ID on the registered mobile number or email ID
Check your email inbox for the IRCTC registration message
Search for keywords like IRCTC, username, or user ID in your email
Check old SMS messages from IRCTC
Contact IRCTC customer support if you cannot find it