Hello student if you've cleared the Jee main cut off you're eligible to appear In Jee advance examination. Applicants need to fill the application Form on the official website - jeemain.nta.ac.in

Applications Form begins from September 12 and shall remain open till September 17. Fill the application Form before September 17and pay the application fee till September 18.

Eligibility - This year there's no minimum percentage eligibility criteria for IIT's, candidates need to obtain a passing certificate only.

For more details refer to the link mentioned below - https://www.google.com/amp/s/engineering.careers360.com/articles/jee-advanced-application-form/amp

Feel free to comment if you've any doubt

Good luck