Hey nithesh!

JOSAA and CSAB are two different counselling procedures. And they have different fees. The fee of JOSAA is not adjusted in CSAB round. The amount of fee you paid for JOSAA counselling can only be refunded back after a deduction fee of Rs.1500 , only if you choose to withdraw your seat till sixth round of counselling.

And if you are going to participate in CSAB special round , then you are not required to pay the admission fee.

Hope it helps!