The Form 8379, Injured Spouse Allocation will not increase or decrease the tax refund on a federal tax return.
After the form is received by the IRS they would apply the information provided on the form and send the portion of a tax refund allocated to the injured spouse as a refund check in the mail.
If you completed the form and e-filed your tax return it would have been included with the e-filed tax return.
To access your current or prior year online tax returns sign onto the TurboTax website with the userID you used to create the account - https://myturbotax.intuit.com/
Scroll down to the bottom of the screen and on the section Your tax returns & documents click on Show. Click on the Year and Click on Download/print return (PDF)
Or -
When you sign onto your online account and land on the Tax Home web page, scroll down and click on Add a state.
This will take you back to the 2019 online tax return.
Click on Tax Tools on the left side of the online program screen. Then click on Print Center. Then click on Print, save or preview this year's return. Choose the option Include government and TurboTax worksheets