If you've already filed and your return has been accepted, you
will have to mail Form 8379 to the IRS using TurboTax to create the form.
Using TurboTax Online, open your return and sign in. On
the Welcome home screen,
select Taxes.
On the Tax
Timeline screen, select Amend (change) return.
When your return is open, In the search box, search for injured spouse and
then click the "Jump to" link in the search results. Answer Yes to Do you want to claim innocent or
injured spouse relief? and carefully follow the onscreen
instructions for Injured Spouse.
Please see the following TurboTax FAQ, "How do I file Form
8379, Injured Spouse Allocation?:
Form 8379
lets the "injured
spouse" get back his or her portion of a jointly-filed
refund, if it's seized or offset to pay
the spouse's debt.
Please also see the following IRS Tax Tip,
"Injured or Innocent Spouse Tax Relief":
https://www.irs.gov/uac/injured-or-innocent-spouse-tax-relief