Hello Aspirant,

Your question is not very clear but how much I understand from it, let me try to give you answer on that basis. So there was no need to change any date in the JEE-Main 2021 Application form just you have to select the attempts for which you want to appear and and if you had filled your JEE-Main 2021 Application form for May attempt in February then also nothing to worry because there was no requirement of change. Now you have to only appear for the registered session i.e., of May session which is going to be conducted from August 27th to September 2nd.

No there are no chances for re-opening of JEE-Main correction window for 4th session because the last dates have already passed.

You can check out the link given below for more details :-

https://engineering.careers360.com/articles/jee-main-application-form-correction

Now to bind-up your preparation of JEE-Main 2021 kindly check out the link given below :-

https://learn.careers360.com/jee-main-rank-booster/?icn=jee-rank-booster&ici=c360-Exam-View-WEB-Sticky

I hope this information helps you.

Good Luck!!