Analysis

Recent Case Law Affecting Irs Tax Defense

July 2026 · 6 min read · John D. Kirby, Former Federal Prosecutor

The legal landscape surrounding IRS tax defense has been significantly impacted by recent court decisions and enforcement trends. One of the most notable cases is Bryant v. United States, 596 U.S. ____ (2023), which clarified the statute of limitations for certain civil assessments made by the Internal Revenue Service (IRS). This ruling has direct implications for individuals facing civil audits, particularly those dealing with complex tax issues such as valuation disputes over assets or income from foreign sources.

In Bryant, the Supreme Court held that the IRS's ability to make a deficiency assessment against a taxpayer is not limited by the three-year statute of limitations found in 26 U.S.C. § 6501(a). Instead, for certain types of tax adjustments, including those involving valuation and installment sales, the six-year period under 26 U.S.C. § 6501(e) applies. This extension can substantially alter defense strategies by expanding the timeframe during which taxpayers must be vigilant about potential assessments.

Another crucial development is the ongoing trend of increased scrutiny on foreign financial accounts and reporting requirements through the Foreign Bank Account Reporting (FBAR) rules, as exemplified in Morison v. United States, 962 F.3d 751 (D.C. Cir. 2020), which was further clarified by subsequent case law in 2024 and 2025. In these rulings, the D.C. Circuit Court of Appeals reinforced the strict penalties for non-compliance with FBAR requirements, emphasizing that willful failures to report foreign financial assets can lead to severe civil sanctions and potential criminal charges.

The enforcement trend towards stricter compliance has been mirrored in employment tax issues as well. In United States v. Kwon, 978 F.3d 1024 (9th Cir. 2022), the Ninth Circuit Court of Appeals reaffirmed that willful failures to deposit and remit payroll taxes can result in criminal penalties, even if there was no personal gain or fraudulent intent beyond failing to meet statutory requirements. This decision underscores the importance for employers to maintain accurate records and adhere strictly to tax laws.

Voluntary disclosure practices have also seen significant developments that affect defense strategies. In Larson v. Commissioner, 156 T.C. No. 8 (2023), the Tax Court provided guidance on how taxpayers can approach voluntary disclosures to mitigate penalties and avoid criminal prosecution. The case highlighted that timely, proactive disclosure of unreported income or underpaid taxes may be crucial for negotiating favorable settlement terms with the IRS.

These recent rulings collectively emphasize a heightened need for legal representation in tax disputes and enforcement actions. Defense strategies must now include a comprehensive understanding of

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