HI,

See NATA 2021 First stage exam is over, since the result has declared you have to accept it as it is. the category can not be changed now. however NATA second stage exam is going to held on  June 12, 2021,  NATA 2021 Correction facility is available from May 25- 30, 2021, so you again appear in NATA second stage providing correct Information.

however follow our article at below link to know in details:

https://engineering.careers360.com/articles/nata#NATA-2021-Exam-Dates