Hello Sejal,

Exam conducting bodybCOA does not entertain correction of NATA form once the candidate submit the application form. However in rare circumstances if mistakes is major and it needed to be recitified immediately then the authorities might entertain the correction of application form on request through email. You need to request before the issue of admit card. 

You can mail them in the ID nata2018helpdesk@gmail.com.

For information regarding how and what corrections can be made to correct discrepancy please go through the below link address

https://engineering.careers360.com/articles/nata-application-form

Hope this helps!