Hi

You need to submit your category certificate right now while filling jee main application form itself.

But in case,

Even if you don't have your category certificate right now , you don't need to worry, right now while filling jee main application form, you can download the self declaration/ undertaking and fill it and submit it in place of category certificate. The self declaration/ undertaking form for category you belong to is available on the page number 9 of pdf for which link is given below :-

https://jeemain.nta.nic.in/webinfo2021/File/GetFile?FileId=5&LangId=P

But make sure that you have your category certificate by the time of counselling.

Now,

application window for jee main May / 4th session is  iopen from 9 to 12 July 2021 (upto 09:00 PM). Jee main 2021 May session will be conducted from 27th july - 2nd August 2021.

For more details regarding dates checkout:-

https://engineering.careers360.com/exams/jee-main

The direct link for jee main 2021 , new Registration Form and registration Form correction is given below :-

https://testservices.nic.in/examSys21/root/Home.aspx?appFormId=101032111

Thank you