You need not to worry about this mistake being you can edit the application form which have built for the respective exam whether it be EAMCET for JEE mains or neet.

Any exam it be there will be an edit option for you provided to edit the application form which are entered by yourself if you cannot find the application form edit option then you can contact the respective board which exam you are writing whether it be EAMCET for JEE mains and edit your application form.