Hello,

In NTA NEET UG 2021 Information brochure a clear date is mentioned and the photograph must be taken within the said date. As per the specifications given the Information Brochure the passport size photograph and the post card size photograph must be taken on or after January 1, 2021. SO if you can upload the photos which were taken on January 1, 2021 till date. The name of the candidate and the date of photo taken can be indicated on the photograph. It is not mandatory to mention but it is preferred. If you have taken photographs on or after January 1, 2021 you can upload them if not you have to take new photographs before the last date of the application and i.e August 6, 2021 and upload them while filling NEET UG 2021 application form.

You can find the specifications in the page 31 of NEET UG 2021 Information Brochure

https://ntaneet.nic.in/webinfo/File/GetFile?FileId=2&LangId=P