I can help you with that. There isn't just one address where all the 8379 Injured Spouse forms get mailed to.
- See the 1st screenshot. Depending how you are filing and which tax return form, it will direct you to the address in the 2nd screenshot.
Just mail the form if you aren't filing it with your income tax return. See How do I file Form 8379, Injured Spouse Allocation?
