Hello Aspirant,
As we know that to qualify for JEE Mains, there is no minimum aggregate percentage criteria but yes if you want to take admission into NITs, IIITs or CFTIs then you should score a minimum aggregate of 75% in your class 12th if you belongs to General/Unreserved category and 65% if you belongs to any of the reserved category. Now if the board's overall result goes down then top 20 percentile method will be considered which means that if your score comes under top 20 % of result then also you are eligible for admission to NITs/IIITs/CFTIs even if you did not get 75% in class 12th.
On December 16th 2020 the application process for JEE-Main 2021 Feberuary attempt has been started by National Testing Agency (NTA) which is the conducting authority for JEE-Main 2021. You can apply for JEE-Main from the official portal of JEE-Main which is given below :-
https://jeemain.nta.nic.in/webinfo2021/Page/Page?PageId=1&LangId=P
Note that this application process will continues till January 16th 2021 and last date for payment of application fee is January 17th 2021 after which neither application nor application fee will be accepted and then after the correction window will be opened for the applicants from January 19th to January 21st 2021. Admit cards will be available for download from second week of February 2021 and the examination will be conducted from February 23rd to February 26th 2021 in two shifts per day, for February attempt.
A candidate will also have option to apply for one Session or more than one Session (February/ March /April /May 2021) together and pay exam fee accordingly. In other words, if a candidate wishes to apply only for one Session, he / she has to pay Examination Fee only for that Session during the current application period and will have opportunity to apply again for the March/ April / May Sessions.
Some insights of JEE-Main 2021 :-
This year JEE-Main is being conducted with slight changes in it's pattern and it's conduction and you can check out all the changes from the link given below :-
https://engineering.careers360.com/exams/jee-main
I hope this information helps you.
Good Luck!!
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