If you have entered the wrong 12th roll number in the final registration for AIIMS Paramedical, and the correction window has already closed, then unfortunately, you won’t be able to edit it now through the portal. However, this issue can often be resolved later during document verification or counselling if all your other details match and your original mark sheet is correct.

You should contact the AIIMS exam helpdesk or official email immediately and inform them about the mistake. Carry your original documents to the exam and later stages to prove your correct details. Many candidates with similar issues are allowed to proceed if their documents are valid.