See if there is some discrepancy in the image then you will be notified from the side of NTA. Now if you can observe it by yourself then you can change the image once the correction window is available, if you have submitted the application. If you didn't submitted the application till now then you can change the image and submit it finally. The correction window will be available from 11th August 2021.

To know more about NEET correction window visit the link below:

https://medicine.careers360.com/articles/neet-application-form-correction-guide

To know more about the NEET image specifics visit the link below:

https://medicine.careers360.com/articles/neet-photo-size-format-documents

I hope this answer helps. All the very best for your future endeavors!