Dear Sunanda,
There is no procedure as such to make correction in your application form as of now.
If you want you can write your query to the officials at ugadmissions@iiit.ac.in
You don't need to worry about this as it will not create any problem you can show your documents later on.
Good Luck!!
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile