IIIT Hyderabad is a private college in Hyderabad , Telangana and its reputation is similar to top IITs of our country , for admission in it you have to give JEE Mains and JEE Advance and based on the best score in between the two examination you will get admission in this college . Institute also has separate examination for entrance but form filling date was over on 16th May. So now option available for you through Mains .
You have to apply a separate form for counseling in the Institute , you will get in on their official website . The form was expected to arrive in April but due to Covid-19 it has not arrived yet . So you check admission portal daily .
There isn't any separate application form to apply for IIIT, Hyderabad.Candidates qualifying in JEE Main can register in JoSAA counselling portal.The admission is done through JoSAA counselling.You can apply for JEE Main as it is reopened again and it will be available till May 24, 2020.
You can apply for JEE Main here https://testservices.nic.in/examsys/root/applyfor.aspx?enc=Ei4cajBkK1gZSfgr53ImFQTbjVzuZ1mQajFt6EnKeZHKamP47NHChWeaE1r86anz