The required documents for applying for KCET are

1) SSLC / 10th standard Marks Card, 

2) 2nd PUC / 12th standard Marks Card of the candidate, 

3) Candidate’s Study Certificate;

4) If claiming Rural quota: - Rural Study Certificate from 1st to 10th std for Ten Complete Years.

5) If claiming Kannada Medium quota: Kannada Medium Study Certificate from 1st to 10th std for Ten
Complete Years;.

6) If claiming reservation benefits: Caste / Caste Income Certificate issued by Concerned Tahsildar- For SC
/ ST in Form-D, Category-I in form E and 2A, 2B, 3A and 3B in Form F.

Hope this will help you. For more details about KCET, download information brochure from kcet site. the link to download is given below. 

http://kea.kar.nic.in/cet2019/e_brochure.pdf