Q. Does signing over form 8332 mean my ex will be able to get the $500 credit (he never received the stimulus for our child either)?
A. Yes.
"In essence, the stimulus check acts as an advance of your 2020 income tax refund. Whoever claims the child as a dependent (child tax credit) gets to claim the child's "stimulus" as The recovery rebate credit. The ex will also claim the 2nd child ($600) rebate credit, even though you already received it. You do not have to pay back the $600 you received. It's a tax loop hole, you both get the money!
