Top International Tax Cases Of 2026: Midyear Report

Molly Moses
Contributing Editor

The U.S. government came out ahead in four of the most closely watched international tax cases decided in the first half of 2026, scoring a victory against telecommunications giant Liberty Global and prevailing in a computational dispute over Varian Medical Systems, among others. Here, Law360 looks at some of the most significant court rulings from the year's first half.

Int'l Tax In June: Tariff Refunds Challenged, EU Sets Agenda

Molly Moses
Contributing Editor

As U.S. Customs and Border Protection entered the second phase of its process for refunding invalidated tariffs in June, President Donald Trump's administration challenged its authority to issue those refunds. Here, Law360 examines some of the past month's biggest international tax developments.

Burnham's Devolution Agenda Could Portend Higher Taxes

Josh White

Labour leadership contender Andy Burnham's speech setting up his devolution agenda may foreshadow higher taxes down the road if he ultimately becomes prime minister, given the costs of his ambitious plans for expanding investment for housing and infrastructure.

Power To The Paralegals: Burnout As A Structural Problem

Law firm leadership can best retain their paralegals not by encouraging self-care, but by seeking top-down structural solutions for the quiet proliferation of responsibilities and the vicarious exposure to client trauma that particularly drive burnout in this vital role, says Erika Sneeringer at Brockstedt Mandalas.

Managing Post-IEEPA Tariff Refunds, Replacements And Risks

Companies and investors reeling from the rapid changes resulting from February's U.S. Supreme Court ruling that the International Emergency Economic Powers Act doesn't authorize tariffs should focus on understanding the duty refund process, the likely replacement tariffs and the operational ways they can minimize their tariff exposure, say attorneys at Debevoise.

Economic Questions To Ask Amid Tariff Refund Class Actions

The U.S. Supreme Court's recent holding that the International Emergency Economic Powers Act doesn't authorize the president to impose tariffs has sparked class actions, but determining whether a retailer received a windfall is complex, even if it passed tariff costs into consumer prices before receiving a refund, say economists at Ankura Consulting Group.

Cow Horse Makes Me A Better Lawyer

Moving an unwilling 800-pound cow while riding a horse at high speed is exhilarating, a little unhinged and, at least for me, a surprisingly effective training ground for litigation — both demand focus, preparation over rigid planning and the willingness to act despite fear, says Ashley Zitrin at Glenn Agre.

Checking For AI Errors Is Now A Two-Way Street

A handful of recent federal and state cases demonstrate the importance of checking for errors generated by artificial intelligence not only in your own court submissions, but also your opponent's, as well as when catching opposing counsel's AI mistakes could result in an award for attorney fees, says Tamara Barago at Hollingsworth.

5 Things Associates Must Ask About Their Firm's Merger Plan

The associates who navigate law firm mergers best ask the right questions early, such as inquiring about partners' plans, to assess how the merger could affect their workflow and career path, says Jackie Bokser-LeFebvre at Major Lindsey.

2 'Rocket Dockets' And The Rules That Propel Them

The fastest civil trial courts in the country are currently in the Eastern District of Virginia and the Southern District of Florida, and their chief judges provide insights into the court rules that keep them ahead, says Robert Tata at Hunton.

Your Next Litigation Hold Should Cover AI Chat Logs

The Delaware Chancery Court’s recent decision in Fortis Advisors v. Krafton to treat a CEO’s artificial intelligence chats as substantive evidence is being read as a discovery warning to litigators, but there is a second duty-to-preserve lesson that is especially pertinent to in-house counsel, say attorneys at Faegre Drinker.

Studying Foreign Languages Makes Me A Better Lawyer

Studying Italian and Japanese has shown me that learning a new language can benefit a legal career in several ways, including by demonstrating the importance of approaching problems from a fresh perspective and the value of practicing patience with colleagues and clients, says Anna King at Genworth Financial.

Sold Inventory May Drive Tax Treatment Of Tariff Refunds

Companies determining the tax treatment of refunds expected following the U.S. Supreme Court's February decision invalidating tariffs imposed under the International Emergency Economic Powers Act should consider whether the tariff costs have already reduced their income considering the cost of goods sold, say attorneys at McDermott.

Adapting To AI-Driven Scrutiny Of Foreign Asset Disclosures

As the government expands AI-driven, cross-agency fraud detection, foreign asset disclosure should be viewed as part of a broader, data‑driven enforcement ecosystem that prioritizes consistency, documentation and proactive governance, says Logan Koehring at FBT Gibbons.

Tax Teams Get No Bright-Line Rule From AI Privilege Cases

Three recent appellate decisions that considered artificial intelligence in the context of attorney-client privilege protections illustrate that taxpayers and tax practitioners alike must consider the pertinent facts on a case-by-case basis, with particular attention to confidentiality, disclosure risk and system design, say attorneys at Morgan Lewis.

NY Times Word Puzzles Make Me A Better Lawyer

Every morning I let The New York Times humble me with word games, which offer a chance to recalibrate my brain before the day's chaos arrives and remind me that a solution — whether to a puzzle or employment law issue — almost always exists once I find the right angle, says Amy Epstein Gluck at Pierson Ferdinand.