Hii there,

Dear candidate, if you get seat in any of the rounds of JOSAA counselling and you report to the college, you can select for appearing in CSAB counselling for getting more better college. But if you don't select that option then you are eligible for going to to CSAB counselling 2020. I hope this solves your concern. For more queries visit here

https://engineering.careers360.com/articles/csab-special-round-for-nits-iiits-and-gftis/amp#aoh=16025939207332&amp_ct=1602593953807&referrer=https%3A%2F%2Fwww.google.com&amp_tf=From%20%251%24s

All the best!