did he owe any taxes on his income?
the difference in his return is going to be the standard deduction. the formula is different if he is a dependent, but is $12,200 if not a dependent.
if he didn't owe any taxes when he marked himself as a dependent, it's not going to matter.
when i state 'owe taxes', i don't mean whether he paid or got a refund, I mean his tax liability.
look at likes 8b, 9 and 11b.....
if 8b-9 was zero when he filed, it's not going to matter because the new tax return would be 8b-$12,200.
