A caption for this particular tax debt relief page

You may be able to reduce or remove your tax debt if you can prove that the resulting penalties were no fault of your own, but in fact, occurred from an erroneous income tax return filing by your spouse or ex-spouse completely unbeknownst to you. You must be able to prove to the IRS that when your spouse filed, and you signed the joint return, you were unaware (and had no reason to be aware) of the underestimated joint tax liability. To request innocent spouse relief, provide a detailed explanation and any proof you have of the situation, along with IRS Form 8857 to the centralized processing location at:

IRS – Stop 840-F Innocent Spouse PO Box 120053 Covington, KY 41012