Dear Aspirant, previously the upper age limit was 25 years as on the date of examination (5 year relaxation is given to SC, ST, OBC-NCL & PwD candidates).

But now the upper age limit criterion has been removed from the eligibility of NEET. There is no upper age limit till the Supreme Court passes its judgement on it. So you can go for as many attempts as you want.

I hope this helps you!