Query relating to ITR 1 And Form 16

My father is a senior citizen . He is a former bank employee and a pensioner . My father has invested Rs. 150000 in Public providend Fund . He has given the right declaration to the bank authority but mistakenly in Form 16 it is showing as Rs. 45000 as deduction u/s 80c . Now my question is Can he file ITR 1 without revision of Form 16 and claim a deduction of Rs 150000 as deduction u/s 80c ? Can that ITR 1 be accepted by the income tax department ? Can that return be processed and get his refund for which he is eligible ? Or He has to revise his form 16 first and then file his ITR 1?