Hi Laksh,

You could change the following fields in your NEET application form till the 31st of May.

• Father's Name
  
• Mother's Name
• DOB
• Category, and
• Gender

You could change your details on this link: https://ntaneet.nic.in/Ntaneet/online/CandidateLogin.aspx

Also, you do not have to submit any certificate as of now. However, you have to produce the document on the time of counseling.

Hope this helps.

Other links:- https://medicine.careers360.com/neet-college-predictor?utm_source=google-search&utm_medium=paid&utm_campaign=neet-clgpd

All the best. Thank You.