For filling itr 1 form 16 necessary

Sir, My client's salary is Rs. 96,000 /- per year. His salary has come through bank account. Now he wants to purchase a tata ace for business and for this purpose he is taking loan. Bank wants IT file. My question is that - 1). As he has no pay slip or form 16 can he file his return in ITR 1 by showing NIL tax. He has no other salary proof except bank payroll account. Please clarify me anyone.