Hello aspirant,
If you want to attach EWS certificate for your competitive exams, it must be of your father's. This is because you are not earning right now, so the officials won't ask you about your income certificate. Your father is the breadwinner of the family, so he has the income certificate plus he has to show his financial background. So in the case, you must attach your father's income certificate.
Hope, this information helps you.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile