Cast certificate is very important in college admission as it may help you by reducing your college fees, you can get scholarships, free stationary and many other benefits. Besides all this it is a compulsory document for admission. So you should talk to your parents so that it can be made.

Here is the link regarding whom you should approach for this certificate-

https://www.google.co.in/amp/s/m.jagranjosh.com/articles/amp/who-issues-certificate-to-candidates-belonging-to-schedule-caste-schedule-tribes-and-obc-1301996452-1