Unfortunately, you cannot get a refund of the seat acceptance and partial admission fees paid during JOSAA if you participate in CSAB and decline a seat.

Once you accept a seat in JOSAA, you enter into an agreement with the allotted institute. Even if you participate in CSAB later, this initial agreement remains valid.

However, there might be provisions for fee adjustments or transfers within the same institute if you secure a different program through CSAB.

It's crucial to carefully consider your options before accepting a seat in JOSAA, especially if you plan to participate in CSAB. Understanding the implications of your decisions is essential to avoid financial losses.

hope this helps you!!