Illustration of late May 2026 federal tax roundup — JCT OBBBA report, Treasury IRS guidance T.D. 10048 and Notice 2026-33, House tax bills, and Tax Court section 6038(b) rulings
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Federal Tax Roundup Late May 2026: OBBBA, IRS Guidance, Courts

What are the most important federal tax developments from late May 2026? Four stand out. (1) The Joint Committee on Taxation released a 341-page provision-by-provision report on the One, Big, Beautiful Bill Act (OBBBA, P.L. 119-21) and flagged 10 provisions that may need technical correction. (2) Treasury and the IRS issued new guidance — final…