NEET is the entrance examination for admission to MBBS, BDS, Ayush and Veterinary Courses across India. NEET is also mandatory for studying MBBS.BDS abroad. Now if you want to study MBBS/BDS abroad, then you can use your 2019 NEET score for 3 years starting from 2019. So it is valid until 2021. But if you want to study MBBS/BDS abroad, then the validity of the score is just 1 year and you cannot use your 2019 NEET score for admission in 2020.