Hello Aspirant, A person is allowed to give JEE Main for 3 years, i.e 12th passing year and the next two consecutive years. For Example if a person passes 12th Exam in 2020 then he/she can give JEE Mains 2020,2021 and 2022. And taking about JEE Advanced, A person can give JEE Advanced 2 times in 12th passing year and the next years means if someone passes 12 in 2020 then he/she can give JEE Advanced 2020 and 2021