Tulsi, you can upload a photograph in NEET application form only once. The next time you have to upload is when NTA thinks your photograph doesn't meet the guidelines and sends you a notification at your registered email and mobile no# asking you to upload another photograph that falls within the guidelines. I repeat, you cannot upload a photograph for the 2nd time unless you have been asked by NTA. So, if NTA finds it faulty, they themselves will ask you to change the photograph. Or else you can be assured that the photo uploaded was good enough. There is nothing that you can do right now and also nothing to be worried about either. Please focus on the preparation because the fact is that NTA gives chance ti correct images.