Welcome! My goal is to do my very best to understand your situation and to provide a full and complete answer for you.
Good evening. First, although you may be willing to help her pay the IRS, you have no legal liability
for your girlfriend's debt to the IRS, so the IRS has no right to consider your income
in evaluating this situation. That works in her favor. Second, what she wants to do is pursue an Offer in Compromise with the IRS. When a taxpayer owes money they cannot reasonably pay back over a period of 72 months, the path to take is to file an application for an Offer in Compromise where the IRS will agree to forgive all or a portion of it that can't reasonably be paid within the 72 month period considering her income, assets, and allowable expenses. There is a step by step process for filing
the Offer in Compromise application, as well as the full details of the program, in the IRS Offer in Compromise booklet which you can find at the following website: www.irs.gov/pub/irs-pdf/f656b.pdf
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