Dear Satyam, for now the basic eligibility criteria to attempt NEET is that you should have atleast completed 17 years of age by December 31, and score a minimum of 50% in your +2 with Physics, Chemistry, Biology/Biotechnology and English as your core subjects. Assuming that the criteria remain the same, you will enter +2 in 2019 and you will be eligible for NEET 2020. 

Hey Satyam

yes you’ll be eligible for NEET 2020 if you pass your 12th board exam from a known board with a minimum score of 50% in Physics, Chemistry & Biology. 

Best of luck!