If the CUET application form specifically required your Class 12th roll number and you missed it, there is a small chance that it could create an issue during verification. However, in most cases, minor errors like this do not lead to outright rejection, especially if other details (like your school name and board details) are correctly filled in.

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Hello,

Your CUET application form will not get rejected just because you forgot to enter your Class 12th roll number. This detail is usually required for records, but it is not a mandatory field for eligibility.

Since the correction window is closed, you can inform the exam authorities during the document verification process or when the admit card is released.

Hope it helps !