Dear student,

CSAB - Central seat allocation board is responsible for filling of vacanct seats after jossa round counseling.
It is basically of two rounds and it will be held after josaa all round counseling.
Till now there is no offical dates released.

So, better you check regularly the csab offical site for updates

Also Check out the following link to know more about csab 2020 counseling :-
https://engineering.careers360.com/articles/csab/amp