If you are filing for injured spouse relief at the time that you file your tax returns, just attach the completed form to your return. If you are filing for injured spouse relief after filing your tax returns, just send in the completed Form 8379 as well as any W-2s or 1009s for you and your spouse. When filing the Form 8857, you do not need to include your tax return. You should include any W-2s or 1099s for you and your spouse you may have access to.