If you e-filed and included the Injured Spouse Form, you do not need to mail anything. Your return will be processed with the Form 8379, and the refund issued.
If you are filing the Injured Spouse Form on its own (after e-filing your return), you will mail it to the IRS location for your state. Include a copy of all W-2 forms and any 1099 forms showing federal tax withholding, for both spouses. You can find the mailing address for your location using this link (use the 'not including a payment' address): <a rel="nofollow" target="_blank" href="
https://www.irs.gov/uac/Where-to-File-Addresses-for--Taxpayers-and--Tax-Professionals-Filing-Form-10...>
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