does NITs college and in jossa councling ask for income certificate for sc student with father's government job..?
Yes they do. All the colleges which come under the Joint Seat Allocation Authority (JoSAA) require the parents of the candidates to furnish an income certificate if the student needs a fee concession, regardless of the job of the parent. So if you are applying for an NIT and you want some concession in fees, then you will have to provide the income certificate of your father.
Hope I have answered your question. All the best!