Yes, you may file either the Innocent Spouse Relief of the Injured Spouse Allocation. Each of these forms has a different purpose and which form you use depends on specific details on the nature of the debt owed.
I have attached the forms and instructions to this message as well as a TurboTax FAQ that explains the difference between the two and which one would suit you best. Since you have already filed your return, this form will have to be mailed to the IRS. Please read the instructions carefully and don't forget to include any recommended, or required, documentation.
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