No. Your spouse should not send the money to the IRS. When your spouse files their tax return for 2021 they will be asked if they received Advanced Child Tax Credit. They will enter in the box how much and how many children she received in tax credit. Since you are claiming the child(ren) on your tax return then she will not have them on her return and this will cause TurboTax to show that she has to repay this amount to the IRS. Depending on the amount of her tax liability plus the tax credit less the amount of withholdings, she will either get less of a refund or actually owe.
Reconciliation of the Advanced Child Tax Credit is being handled through the filing of tax returns.
2021 Updated Child Tax Credit FAQs
