Hello Student,

JEE Mains 2021 is going to held in four sessions i.e. February, March, April and May. You have to fill only one JEE Main 2021 application form for all four sessions, but the application fee has to be paid depending on the number of sessions you select to appear.

Also, if you have not done the registration for the next sessions now, then don't be worry. The application form window for those sessions will open briefly before the exam. And NTA will provide all the necessary details about that. For more info, visit the link given here.

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-application-form/amp

Best of luck for your exam.