If your spouse owes child support. you can file jointly and file form 8379 - Injured Spouse to prevent the IRS from offsetting your share of the refund.
To file Form 8379 - Injured Spouse, please read this TurboTax FAQ:
https://ttlc.intuit.com/replies/3326788
Per IRS: "You may be an injured
spouse if you file a joint tax return and all or part of your portion
of the overpayment was, or is expected to be, applied (offset) to
your spouse's legally enforceable past-due federal tax, state income tax, state
unemployment compensation debts, child or spousal support, or a federal
nontax debt, such as a student loan."
If your spouse owes child support. you can file jointly and file form 8379 - Injured Spouse to prevent the IRS from offsetting your share of the refund.
To file Form 8379 - Injured Spouse, please read this TurboTax FAQ:
https://ttlc.intuit.com/replies/3326788
Per IRS: "You may be an injured
spouse if you file a joint tax return and all or part of your portion
of the overpayment was, or is expected to be, applied (offset) to
your spouse's legally enforceable past-due federal tax, state income tax, state
unemployment compensation debts, child or spousal support, or a federal
nontax debt, such as a student loan."