Dear aspirant,

Yes, you can participate even in the csab counselling retaining your josaa seat. This provision has been introduced since last year . Before this , you would loose your josaa seat if you participate in csab rounds.

But now you can participate in csab comfortably. For withdrawal of seat,you can withdraw your seat after 5th round but not after 6th round. After 6th round you won't get your refund for nit +system.

For more information you can check out the link given below-

https://engineering.careers360.com/articles/josaa-seat-allocation