I think this will help You, This is what mentioned in The NEET important Points:
"Ensure that correct data is submitted in the online application. Any correction pertaining to the photograph and signature of the candidate will be intimated through e-mail/SMS and the same will be available in the candidate’s login account. Other permissible corrections can also be carried through log-in account only during schedule fixed for the same. Candidates may ensure clear photograph and signatures are uploaded. Thereafter, no request for correction(s) will be entertained except when the window for correction in all fields open."
Source:
Https://ntaneet.nic.in/Ntaneet/importantpoints.pdf
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