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I. Introduction

On October 20, 2025, the U.S. Department of the Treasury (“Treasury”) and the Internal Revenue Service (the “IRS”) issued proposed regulations (the “Proposed Regulations”) that would helpfully revoke the current “look-through rule” for domestic C corporation shareholders to determine whether a “real…

On July 25, 2025, the U.S. Court of Appeals for the Eighth Circuit affirmed the District Court decision holding that the Mayo Clinic is entitled to an $11.5 million refund of certain unrelated business income taxes imposed on it due to it being an “educational organization” under section 170(b)(1)(A)(ii).[1]…

On June 17, 2025, the Tax Court opinion in AbbVie Inc. and Subsidiaries v. Commissioner of Internal Revenue was issued,[1] holding that the approximately $1.6 billion termination fee AbbVie (a Delaware corporation) paid to its abandoned merger partner Shire plc (an Irish company) was properly an ordinary deductible business…

On May 28, 2025, in Soroban Capital Partners LP v. Commissioner (T.C. Memo 2025-52) (“Soroban II”), the Tax Court held the active role of limited partners in a fund manager caused them to fail to qualify as “limited partners” for purposes of section 1402(a)(13) and, therefore, the limited…

On April 17, 2025, the U.S. Internal Revenue Service (the “IRS”) issued Notice 2025-23 (the “Notice”), announcing its intention to withdraw the recently released final regulations final regulationsthat classify certain partnership related party basis shifting transactions and substantially similar transactions as “transactions of interest”. The Notice provides taxpayers and their…

Introduction

On January 10, 2025, the Treasury Department and the U.S. Internal Revenue Service (the “IRS”) released final regulations (the “regulations”) classifying certain partnership related party basis adjustment transactions and substantially similar transactions as transactions of interest, a type of reportable transaction, which requires disclosure for the taxpayer and its…

I.          Introduction

On January 30, 2025, Mike Crapo (R-ID), the Chairman of the Senate Finance Committee, and Senator Ron Wyden (D-OR), the Ranking Member of the Senate Finance Committee released a discussion draft of the “Taxpayer Assistance and Service Act” (the “bill”), a bipartisan taxpayer rights bill intended…

On January 17, 2025, multiple news outlets and other sources reported the existence of a memorandum circulated by the U.S. House of Representatives Budget Committee to the House Republican Caucus (the “Memorandum”) containing an extensive list of budget proposals that may be considered in connection with the new Congress’s widely expected budget reconciliation legislation. The Memorandum, which is publicly available via link from a number of news outlets,[1] contains approximately fifty pages of proposals covering a wide range of policy areas and enumerating scores of potential specific legislative proposals (along with estimated budget effects in most cases), some of which are seemingly mutually exclusive. Included in the memo are a number of tax-related proposals, including tariff proposals, which are briefly set forth below.

On January 20, 2025, the White House issued a memorandum (the “Memorandum”)[1], announcing that the “Organization for Economic Co-operation and Development (OECD) Global Tax Deal” (the “Global Tax Deal”) has “no force or effect in the United States” and disavowing “any commitments” previously made by the United States…

On December 23, 2024, in Denham Capital Management LP v. Commissioner (T.C. Memo. 2024-114), the Tax Court reaffirmed its earlier ruling in Soroban Capital Partners LP v. Commissioner (161 T.C. No. 12.) that active limited partners of a state law limited partnership are not entitled to the “limited partner exception”…