Hello there!

Hope you are doing fine.

Application for JEE mains paper 2 has been started in August already.

As per the information available online,

The exam is to expected to conduct on August 26, 27, 31, and September 1 & 2, 2021.

Check official website of NTA for updates and detailed information about exam's applications, eligibility and syllabus.

Link of official website is following:

jeemain.nta.nic.in

Hope it helps.

Stay safe.

Best wishes.