hii Pusarla ,

Joint Seat Allocation Authority conducts the Counselling and Seat Allocation Process for 23 IITs, 31 NITs, 23 IIITs and 23 Other-GFTIs. Candidates qualifying in JEE Mains and JEE Advanced 2019 will have to register for JoSAA counselling to get admission in participating colleges. JoSAA Counselling is expected to begin from second week of June. Official schedule will soon be revealed by the authority.

Link for JEE Mains - http://jeemain.nic.in/

Link for JEE Advance - http://www.jeeadv.ac.in/

Hope I resolved your query.