If i put my dependent as other in 2016. And put the,same dependent,as nephew in 2017 is that a problem

[Phillip1 · Accepted solution]

No, it should not be a problem. Clerical errors are easily resolved and explained.

If the IRS ever inquire about the situation, you will just need to provide documentation that shows that he is your son. (The copy of his birth certificate showing your name as a parent should be enough).