•  Apply Online and fill the form in CBSE website.
• Deposit the fee online.
• Print the confirmation page.
• Sign the confirmation page and send it with all documents to CBSE regional office by post.

CBSE will charge Rs.900/- for 5 subjects and Rs.180/- each for additional subject. Compartment or improvement candidates will be charged Rs.200/- per subject.

Hope this helped. 

Good luck!