My son is 22 and in college. I claim him on my taxes as a dependent. He made about $4500 in W2 and 1009-MISC income this year, and $105 was withheld from his W2 income as federal taxes. TurboTax is calculating that he owes $89 in taxes, but I thought he would not owe any taxes since the threshold is $12,000 in 2018. Shouldn’t he get that whole $105 back?