Dear candidate, the basic eligibility criteria is you must have scored 75% in board exams in class 12th to be eligible for JEE Main. However, this was relaxed in 2020 and 2021 as board exams were not conducted smoothly and due to the persisting covid situation. It all depends on 2022 covid condition, that 75% will be relaxed or not. The present scene is that 75% is mandatory in boards for JEE 2022.

For more information, you can check:

https://engineering.careers360.com/articles/jee-main-2022

Hope, it helps!