Hey Kadem,

JoSAA is an Annual Counselling happened For IIT-JEE. In which JEE-Mains And JEE-Advance Qualified students participate for getting into IITs, NITs, IIITs, & GFTIs and other institutions across India. For Applying You must apply for JEE and Must qualifying at least JEE Mains to participate in JoSAA and get Your desired College.

Best of luck