The IRS Can Come for You Anytime: What the Supreme Court's Murrin Decision Means for Tax Pros

On Monday, the Supreme Court denied certiorari in Murrin v. United States. One sentence in the Court's orders list. Three words: "certiorari denied." And with that, a bedrock assumption that every tax practitioner and their clients rely on just got a lot less solid.

Here's what happened, why it matters, and what you need to tell your clients.

The Case That Should Worry Everyone

Stephanie Murrin filed tax returns from 1993 to 1999 — the Clinton administration, if that helps date it. Her tax return preparer committed fraud on those returns. Murrin herself was not complicit; she hired someone she trusted, and that trust was betrayed.

Nearly 20 years later, the IRS showed up. They assessed $328,000 in taxes, penalties, and interest. The usual three-year statute of limitations under Sec. 6501(a) had long expired, but the IRS argued that Sec. 6501(c)(1) — the unlimited assessment period for fraudulent returns — applied.

Murrin fought it. She lost in Tax Court, lost in the Third Circuit, and petitioned the Supreme Court. On June 22, the Court declined to hear her case.

The holding: When a fraudulent return is filed with intent to evade tax, Sec. 6501(c)(1) imposes no time limit on IRS assessment — regardless of whether the taxpayer or the preparer had the fraudulent intent.

The statute is "agnostic about who must intend to evade tax," the Third Circuit wrote. That agnosticism just became the law of the land.

What This Actually Means

Let me be direct: this is a bigger deal than most tax pros realize.

For tax practitioners reading this: this decision doesn't just affect your clients. It affects you.

If a preparer in your firm — an employee, a contractor, a seasonal temp — files a fraudulent return, the IRS can assess the taxpayer for that return at any point in the future. The taxpayer's defense that "I didn't know, my preparer did this" no longer triggers the three-year clock.

Murrin's attorneys put it bluntly in their cert petition: "Those taxpayers are left to defend their tax returns when the government suddenly appears unannounced, out of nowhere, asserting massive tax liabilities from decades earlier."

That's not hyperbole. It's a direct description of what happened.

The Practical Reality

For small and mid-sized tax firms, this decision creates several hard new realities:

Your client's liability is timeless when fraud is involved. The three-year statute of limitations is the primary defense against stale IRS claims. This decision carves a massive exception: any return where the preparer acted with fraudulent intent is permanently open. Your client can be assessed in 2026 for something that happened in 1996.

Due diligence is no longer optional — it's existential. If you outsource return preparation, use seasonal help, or employ junior preparers, you need processes that catch fraud. Not "best efforts" processes — documented, auditable, demonstrable ones. Because if a bad actor slips through, the liability doesn't just flow to the taxpayer. It flows back through you.

Your engagement letters need updating. Every single one. Your clients should know, in plain language, that the IRS can assess them without time limit if fraud is involved — even if they weren't the one committing it. This isn't scaremongering. It's the law after Murrin.

What Small Firms Should Do Right Now

1. Audit Your Quality Control Processes

If you don't have documented review procedures for every return that leaves your firm, today is the day to create them. Every return needs a second set of eyes. Every red flag needs a written resolution. "The preparer seemed honest" is not a defense.

2. Update Your Client Intake and Vetting

Know who your clients are. KYC isn't just for banks. If a client brings you returns prepared by another preparer and asks you to "just file them," you need to understand what you're signing. Bad data in from a previous preparer can create fraud exposure for returns you never even touched.

3. Insurance. Actual Insurance.

E&O insurance is standard. Make sure yours covers preparer misconduct by employees and contractors. The limit of exposure here — decades of untouched liability — far exceeds what most small firms carry.

4. Document Everything

The IRS's ability to assess at any time means your ability to defend against an assessment also needs to work at any time. Document your processes. Document your training. Document your oversight. In 2036, when the IRS comes asking about a return filed in 2026, you need to be able to show what happened.

The Bigger Picture

This decision arrived in a week when the IRS also formally warned practitioners about AI risks under Circular 230, kicked off its 2026 collections season with expanded field activities, and released a National Taxpayer Advocate report noting 139 million returns processed. The IRS has more funding, more tools, and now, more time.

The Murrin decision takes something tax pros and taxpayers have treated as a given — the three-year clock — and introduces a permanent exception. For preparer fraud, there is no clock.

The takeaway isn't fear. It's professionalism. The firms that will thrive are the ones that build systems, not the ones that rely on trust.

Key Takeaways

• The Supreme Court let stand Murrin v. United States — the IRS can assess tax without time limit when a preparer commits fraud, even if the taxpayer was innocent.
• Every tax firm needs documented QC processes, updated engagement letters, and a hard look at E&O coverage. Reliance on "good people" is not a substitute for systems.
• This changes the risk calculus for outsourced or seasonal preparer work. The liability tail is now indefinite.