Hey Irfan,
If your family has a government job than form 16A will be enough for income certificate and if you have private job then copy of your income tax returns will be required. You can attach these documents with the self attested certificate stating your family income in your name. You can also make income certificate by sign of any gazetted officer.
Hope it helps.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile