Dear aspirant,

Hope you are doing well, now coming to your query Josaa counselling Candidates who will qualify the JEE Mains or JEE Advanced have to register for JoSAA 2020 to participate in the counselling and admission process for various renowned engineering institutes across India. The admission process for admissions in NITs  , 25 IIITs , and 28 Other-Government Funded Technical Institutes (Other-GFTIs) is managed by The Joint Seat Allocation Authority (JoSAA). Candidates will be allotted seats in seven rounds of JoSAA counselling 2020. The seat allotment through JoSAA will be based on merit of candidates and their preference of courses and colleges.

After Josaa counselling ends Csab is for remaining seats that are vacant after Josaa counselling and some of the private colleges seats.

You can participate in both.