Hello,

Generally your educational details are required to verify them at the time of document verification. Your roll number will be printed on the educational documents and it must be the same as filled in the application form. You do not have to worry if you  have filled the incorrect roll number in CUET application form because you have a provision to correct the details when the correction window is open. Right now the official date as to when the correction window will be available it not announced. It will be notified soon so please keep an eye on updates from time to time.