As of now no official date has been announced yet. You can expect Application form will be released in second week of December and deadline for register online and submit the application would be first week of January. Check NTA official website and keep updated yourself always.

You are suggested to follow the link as well:

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

Hello,

The dates are yet to be anounced. The tentative Start date for NEET 2021 Registration is December 2, 2020. You can find the appllication for when released on ntaneet.nic.in

You may refer the following link to get the updated dates when anounced:

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

Good Luck