You cannot correct your Category details during the correction window for NEET PG. So you will have to re-register with a new Email Id and Mobile no# and fill in a new application. This means a new payment altogether but that's the only way out. NBE doesn't allow any corrections for the fieds like Name, Date of Birth, Gender, Nationality, Email Id, Mobile No#, Photograph, Signature, Category and Exam City. Errors in these fields means a new registration altogether.