“I didn’t know” is one of the most common things a spouse says when the IRS shows up looking to collect on a joint tax return years after a marriage has ended — or even while it’s still intact. Sometimes that statement is exactly the basis for relief. The IRS has a formal process for separating an innocent spouse from a tax liability that was, in truth, someone else’s doing. But qualifying for it requires meeting specific, documented criteria — it isn’t granted just because a spouse feels it’s unfair.

This checklist walks through the three types of relief the IRS offers, who typically qualifies, and what to gather before filing.

The Three Types of Spousal Relief

1. Innocent Spouse Relief

This is the classic form of relief, and it applies to understatements of tax on a joint return — meaning income was left off, or deductions/credits were improperly claimed, resulting in tax being reported lower than it should have been.

• A joint return was filed
• The return has an understatement of tax attributable to the other spouse’s erroneous item (unreported income, or an improper deduction/credit)
• The requesting spouse did not know, and had no reason to know, about the understatement when signing the return
• It would be unfair to hold the requesting spouse liable, considering all the facts and circumstances
• The request is filed within two years of the IRS’s first collection activity against the requesting spouse

2. Separation of Liability Relief

This divides the understated tax between the spouses based on each person’s responsibility for the item that caused it, rather than holding one spouse liable for the whole thing. It’s generally available if the requesting spouse is:

• Divorced or legally separated from the spouse with whom the joint return was filed
• Widowed
• Living apart from that spouse for at least the 12 months before filing the request

Unlike Innocent Spouse Relief, actual knowledge of the erroneous item can disqualify a requesting spouse from this option, so it’s worth pursuing carefully with full documentation of what each spouse knew and when.

3. Equitable Relief

This is the catch-all category for situations that don’t fit the first two — including cases involving underpayment of tax that was correctly reported on the return but never paid (as opposed to an understatement of the tax itself). The IRS weighs a broad list of factors, including marital status, economic hardship, whether the requesting spouse knew or had reason to know the tax wouldn’t be paid, whether they received a significant benefit from the unpaid tax, and whether they’ve made a good-faith effort to comply with tax laws since.

The Innocent Spouse Checklist

Before filing Form 8857 (Request for Innocent Spouse Relief), gather the following. Having these organized dramatically speeds up the IRS’s review and strengthens the request:

• Copies of the joint tax return(s) at issue
• Any IRS notices received relating to the liability (CP2000, deficiency notice, collection notices)
• Divorce decree or separation agreement, if applicable — especially any provision addressing tax liability
• Documentation of separate finances: separate bank accounts, who paid which bills, whether income was commingled
• Evidence of what the requesting spouse knew (or didn’t) at the time of signing — this can include correspondence, the other spouse’s business records, or a timeline of when the erroneous item was discovered
• Evidence of domestic abuse or financial control by the other spouse, if applicable — this is an explicit factor the IRS considers and can significantly strengthen an equitable relief claim
• Current financial information (income, expenses, assets) if arguing economic hardship as part of equitable relief
• A written, factual timeline of the marriage, the return in question, and the discovery of the liability

Timing Matters — Don’t Wait

Innocent Spouse Relief specifically must be requested within two years of the IRS’s first attempt to collect the tax from the requesting spouse. Separation of Liability and Equitable Relief have different — and in some cases more flexible — timing rules, but delay is never advantageous. Evidence gets harder to gather, memories fade, and in the meantime the IRS can continue collection activity, including levies and liens, against the requesting spouse.

If a client receives any IRS notice referencing a joint liability from a marriage that has ended (or is ending), the clock should be treated as already running.

Common Reasons Requests Get Denied

• Filing after the two-year window for Innocent Spouse Relief without a valid alternative theory
• Evidence suggesting the requesting spouse had actual knowledge of the erroneous item, or benefited significantly from it (a lifestyle clearly funded by unreported income, for example)
• Incomplete or inconsistent documentation that doesn’t support the factual narrative in the request
• Requesting relief for a liability that isn’t actually eligible — for example, trying to apply Innocent Spouse Relief (understatement) to a situation that’s really about unpaid tax (underpayment), where Equitable Relief is the correct route

How Family Law Attorneys Can Help

Divorce attorneys are often the first to hear a client mention an IRS letter, an old joint return, or a soon-to-be-ex-spouse’s business dealings that never quite added up. Flagging potential innocent spouse issues early — and looping in a tax resolution professional before the divorce is finalized — gives the client more options and more time to build a strong request.

Have a client who may qualify for innocent spouse relief? Download our free Divorce & Taxes Guide for an attorney-friendly overview of how spousal relief interacts with divorce proceedings, or contact LP Tax & Bookkeeping Pros to review a specific case together.