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In the Tax Court & at the IRS Last Month --- May 2026

2026-06-05

Tax Court Logo

In May 2026, the Tax Court published 9 opinions, which included a total of 137 pages. Below are graphs for the month showing: (i) the top 15 code sections referenced, (ii) cases cited 5 or more times, (iii) the number of opinions by judge, and (iv) the number of pages by judge.

May 2026 Sections referenced

 

May 2026 cases cited

May 2026 Number of Opinions By Judge

May 2026 Number of Pages By Judge

Excerpts from May 2026 Tax Court Cases

I am always interested in learning well-established tax principles. Often, court cases will explicitly indicate that a tax principle is well established or well settled. Or the court may concisely state the holding of a prior case in a parenthetical. Below are excerpts from the May 2026 Tax Court cases referring to these types of principles or holdings.

Lee v. Commr., T.C. Memo. 2026-43. (Siegel)

We have repeatedly held that work demands-even extreme ones-do not constitute reasonable cause for purposes of section 6651(a)(1). Dustin v. Commissioner, 53 T.C. 491, 507 (1969), aff'd, 467 F.2d 47 (9th Cir. 1972).

Li v. Commr., T.C. Memo. 2026-42. (Marshall)

DiLeo v. Commissioner, 96 T.C. 858, 885 (1991) ("A taxpayer is collaterally estopped from denying civil tax fraud . . . when convicted for criminal tax evasion under section 7201 for the same taxable year.")

Shryock v. Commr., T.C. Memo. 2026-44. (Arbeit)

Nis Fam. Tr. v. Commissioner, 115 T.C. 523, 538-42 (2000) (holding that, where taxpayers failed to assign "justiciable error" to any of Commissioner's determinations, taxpayers were deemed to concede all deficiency adjustments)

 

IRS Logo

Announcements, Notices, Revenue Procedures, and Revenue Rulings

In May 2026, the IRS published 9 Announcements, Notices, Revenue Procedures, and Revenue Rulings, which included a total of 90 pages.

May 2026 Rev. Rul.s, Etc. Sections referenced

 

Written Determinations

In May 2026, the IRS published 62 Written Determinations, which included a total of 315 pages.

May 2026 PLRs Sections referenced

 

Tags: Statistics