Innocent spouse relief is only applicable to self-employment tax or individual income tax. Other types such as Individual Shared Responsibility payments, business taxes, and Household Employment taxes do not qualify for this relief.
Spouses who believe that only the other spouse should be held liable for the tax understatement can request tax liability relief by filing Form 8857. In the innocent spouse relief form, the filing spouse provides personal information about themselves and their spouse (or ex-spouse).
The filing spouse is also required to provide information about their involvement with finances and preparation of tax returns for the years they want relief.
A spouse who had knowledge about an error in the entry of an item attributable to their spouse or ex-spouse is not eligible for innocent spouse relief. Both spouses remain jointly liable for that particular tax understatement.
A spouse who had reason to be aware of an erroneous item in the joint return belonging to their spouse or ex-spouse may not qualify for relief. The IRS puts the following facts and circumstances into consideration to establish whether a spouse had reason to know of the erroneous item:
You can get a separate allocation of additional tax and penalties resulting from an erroneous item in a joint return if you are divorced, legally separated, or widowed. If you get this relief, you become responsible for only the tax amount allocated to you.
If you are not eligible for the other relief types following an erroneous item attributable to your spouse (or ex-spouse), you may be eligible for equitable relief.
This relief type may also be available if you reported the correct tax amount in the joint return, but failed to pay tax for that return. Most importantly, you need to show that it would be unjust to be deemed liable for the tax understatement or underpayment under the relevant facts and circumstances.