Hello Aspirant,
It seems that you want to ask about Information Technology branch because through JEE-Main you get Information Technology not Information Science branch.
So, there is no any minimum percentile required to be eligible for admission in NITs/IIITs for any category or any branch because the seat allotment process is based on the rank of candidate but if you are General candidate and wants to get IT branch into any good institution then you should at least try for 98+ percentile in JEE-Main 2021 for top NITs/IIITs and for average NITs 96+ percentile will also be the decent score.
However based on previous year's cut-off trends we can help you with the expected qualifying cut-offs for this year :-
Note that in above table it is not the actual cut-off for JEE-Main 2021 but expected on the basis of previous year's analysis. You can check out previous year's cut-off trends from the link given below :-
https://engineering.careers360.com/articles/jee-main-cutoff
As JEE-Main 2021 result for February and March attempt is out so to have a list of all those colleges which you can get based upon your marks, category, and state you can use JEE-Main College Predictor:-
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
If you are preparing for JEE-Main 2021 or 2022 then I would recommend you to check the resources made by our experts to help aspirants like you in the best and smart preparation of JEE-Main 2021 or 2022 :-
https://learn.careers360.com/jee-main-coaching/?utm_source=%20QnA
I hope this information helps you.
Good Luck!!
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