> His new wife owed back child support so they kept her AND his.
File an injured spouse claim.
This is an easier read than the IRS version: https://www.hrblock.com/tax-center/irs/refunds-and-payments/tax-refund-offsets-injured-spouse-form/
I’ll let him know. It doesn’t sound fair to me that his was taken over a dept he didn’t know she wasn’t paying and they have only been married a year.