Hello there,
CSAB (Central Seat Allocation Board ) organizes counselling for admission in the supernumerary seats in NITs for Union Territories, and in some AICTE approved Institutes for North East and Union Territories (NEUT) on the basis of JEE Main score.

CSAB 2020 will be conducted in october after JoSAA counselling.
You need to follow the given procedure for CSAB counselling:

1. Registration: You need to register yourself on the official website of CSAB NUET by using ur jee mains 2020 applications details.
2. Selection of choices of colleges and courses for admission.
3. Seat Allotment
4.Document Verification

For more information you may check the following link;
https://engineering.careers360.com/articles/csab#:~:text=Registration%20%2D%20In%20the%20first%20step,colleges%20and%20courses%20for%20admissions.


Hope it helps!
Thank You!