The information bulletin says: "Details like name of Candidate, contact/ address details, category, PwD status, educational qualification, date of birth, etc will be treated as final. Any request or mail for changes in information after the closure of the correction period will not be considered by NTA under any circumstances.NTA will not change  any information entered by the candidates on its own after completion of application process under any circumstances. It is upto the Candidate to enter the correct information. Once the correction window has been closed,  NTA does not guarantee that any request for change in information will be entertained".

So you cannot select General Category now and submit Category documents to avail reservation during document verification.