Dear student,

The refunds for the JoSAA and CSAB rounds related to NIT+ System was initiated from 15th December 2020 . You can refer to JoSAA Business rule and CSAB information brochure carefully to assess their eligibility for refunds. The amount will be refunded in the account for which the details had already been provided by the candidates during the registration process.
Also, If your haven't got your amount then you better contact the csab board or enquiry about it.

Also Check out the following information brochure of csab 2020 special round for information and the refund fees :-
https://csab.nic.in/WebInfo/File/GetFile?FileId=18&LangId=P