Hello Candidate,

Since you have not mentioned any particular details regarding which particular college or entrance examination you are concerned with, let me provide with some of the general steps. The best way to correct your doing is to use the correction facility window which provides you with the option to edit your entered documents, and so if you want to to correct your mistake you have to use this opportunity before the deadline escalates.

Hope you got my point. If you have any further queries feel free to post it here!!