My son filled out his W-4 when he was 17 and he filed single zero at that time he wasn’t making much and was being claimed by his dad. Now he’s 21 still works for the same company and filed his own taxes. He has not changed his W-4 and this year he owed, and when we researched it, no federal tax had been taken out of any of his paychecks even though he’s listed as single zero, could this have something to do with the fact that he originally filled out his W-4 as a minor?
