Hello aspirant,   

You must have 10+2 or equivalent with Physics, Chemistry, Biology/Biotechnology as core subject in both Classes 11 and 12 from a recognized board. The qualifyung marks are such that UR - 50%, OBC/SC/ST - 40%, PWD - 45% (minimum aggregate marks only for PCB subjects). There is no minimum no. Of attempts. Minimum age should be 17 years.

You may check the link out or all the eligibilty in detail: https://www.google.com/url?sa=t&source=web&rct=j&url=https://medicine.careers360.com/articles/neet-eligibility-criteria/amp&ved=2ahUKEwiTnKKw4cniAhVDVH0KHYuIAf8QFjAAegQIBBAC&usg=AOvVaw3J48XLYjRlxkl5RSraYMod&ampcf=1

Best of luck!!