Hello,
According to the NEET UG eligibility criteria, minimum age requirement is 17 years as on December 31, 2019. Candidates must be born on or before January 1, 2003 and candidates should not be more than 25 years of age for unreserved category candidates and 30 years of age for reserved and PwD category candidates.
So, if you fulfill the eligibility criteria then you can apply for the exam.
Good Luck!