Grishna, NBE has stated few fields that you cannot change even during the correction window. They are your Name, Date of Birth, Gender, Nationality, Photograph, Signature, Email Id, Mobile No#, Exam City and Category. The rest of the fields, you can make changes. Now you may be able to upload the registration license. But do confirm with the helpdesk once at their email id: neetpg@nbe.edu.in (mailto:neetpg@nbe.edu.in) . And also even if you are able to upload the license, you are still fine if you submit the document during document verification, counselling and admission.