Hello aspirant,

JEE mains Registration for Session 2 has not started yet. The dates for the application form and the registration will be announced soon by the NTA (National testing Agency) and the news will be announced in their Official website of NTA. Therefore, you are advised to keep checking the NTA official website to keep yourself updated for every new news and information related to JEE mains Session 2.
The registration dates for the JEE Mains Session 1 has already been closed and the exam for Session 1 is scheduled to be on the month of June 2022.

Further, to know more about the JEE mains session 2 examination, application form dates, syllabus, etc, you can follow the below mentioned link to know more about it : https://engineering.careers360.com/exams/jee-main

I hope that this will help.