If you have multiple accounts on IRCTC and you want to delete one of them, you can follow the steps given below:

1. Log in to the IRCTC website using the account that you want to keep.
2. Go to the “My Account” section and click on “My Profile”.
3. Scroll down and click on the “Delete User” button.
4. Enter the User ID and password of the account that you want to delete.
5. Click on the “Delete User” button again to confirm the deletion.
6. You will receive a confirmation message on your registered mobile number and email ID.

It is important to note that once you delete an account on IRCTC, all the information related to that account, including the booking history, will be permanently deleted and cannot be retrieved. Therefore, you should be sure that you want to delete the account before proceeding with the steps mentioned above.