Hello Dear.

As the date of photo correction in application is over. Last date to change in application was 30/Jan/2021. So its better to contact to to the authority regarding this issue on jeemain@nta.ac.in email id and phone number 0120-6895200. Earlier the process was to visit the official website of the exam (https://ugcnet.nta.nic.in) Click on the 'Remove Image Discrepancy' link. Sign in to the registered account using application number and password. Go to the section where scanned images of photo and signature have been uploaded.

https://engineering.careers360.com/articles/jee-main-photo-correction

Good Luck