Before applying online be ready with the following documents

(i) Scanned colour recent photo (passport size)
(ii) Scanned Signature,
(iii) Scanned (10+2) Marksheet
(iv) Scanned 10th standard Admit Card/Certificate
(v) Scanned Caste Certificate SC/ST/OBC-A/OBC-B ( if any)
(vi) Scanned PH certificate if any
(vii) Scanned CU Registration Certificate (if registered)