Hello Aspirant,

See admission to NITs are subject to your percentile in JEE-Main and your percentage would be merely an eligibility criteria for admission to NITs like if you would secure 80.6 percent in class 12th then you would be eligible for admission to NITs and also note that this year this percentage criteria (75% criteria) was waived off due to pandemic. Some other eligibility criterion which you need to satisfy some other points :-

1--- Age criteria :- There is no age limit to appear in JEE-Main but note that there might be the age limit in any particular institution taking admission through JEE-Main score, so you should keep this thing in mind.

2--- Qualifying Examination :- To be eligible for JEE-Main one should have passed 10+2 examination with Physics, Mathematics and Chemistry as mandatory subjects from any of the recognized central or state board.

3--- Year of qualification :- For JEE-Main 2021 only those candidates who have passed Class 12 / equivalent examination in 2019, 2020 or 2021; or those who are appearing in Class 12th / equivalent examination in 2021, are eligible to appear.

So if you follow all above criterion then you are definitely eligible for JEE-Main.

For more details kindly check out the link given below :-

https://engineering.careers360.com/articles/jee-main-eligibility-criteria

I hope this information helps you.

Good Luck!!