Hello
Following is the detailed registration fee for CSAB

• All fresh candidates including candidates after JoSAA 2019 who did not pay the seat acceptance fees

General-Rs.36,500   SC/ST:Rs.16,500

• Candidate who is participating in CSAB Special Round after JoSAA 2019 seat allotment and retaining the JoSAA seat

General-Rs.36,500 SC/ST-Rs.16,500

• Candidate who was allotted a seat in JoSAA through SC/ST/PwD category but registered in CSAB through different category

General-Rs.21,500 SC/ST-N/A

• Candidate who got a seat in JoSAA, accepted seat and paid seat acceptance fees but did not report to the allotted college

General-Rs.1,500 SC/ST-Rs.1,500

Follow this link for more
https://www.google.com/amp/s/engineering.careers360.com/articles/csab-special-round-for-nits-iiits-and-gftis/amp
Good luck