Hello student.

Hope you are doing well.

If you are currently in a college and want to give NEET 2021, yes you are allowed to write NEET 2021 again. Also after getting a much better college you can apply for college change procedure, just collect all the necessary documents required for admission in another college and consult your higher authorities once and have a short discussion over it.

Hope this will solve your doubts.

Have a good day!