1. Go to the NITC OPAC website.
2. Click on "Login in to your Account" and enter your credentials (Both username and password are Roll number in Caps, you can reset the password).
3. Navigate to "Your summary".
4. Select the books you want to renew.
5. Click on the "Renew Selected" button.
6. Confirm the renewal and check the new due date.

Note: Only the first renewal is possible online. Further renewals must be done in person at the library and are subject to library policies and availability.