I am an Jee mains candidate, I belong from EWS category, so my father's EWS certificate is valid or not?

Dear student,
To avail the ews reservation you need to produce your ews certificate and not your father's ews certificate. One only needs her father's annual income certificate if his/her father is the only earning person in the family or family's annual income certificate to prove to apply for ews certificate. So if you want to be treated as an ews candidate then apply for your ews certificate as soon as possible otherwise you will be treated as a general candidate.