Tax filing and payment deadlines falling between January 20, 2020 and July 10, 2023 were automatically extended as a result of the federal COVID-19 disaster declarations, the U.S. Court of Federal Claims ruled in Kwong v. United States, No. 23-267 (Fed. Cl. Nov. 25, 2025).

IRS guidance (Notice 2026-15) provides interim rules and safe harbors to be published as future proposed regulations for determining whether a clean energy facility, energy storage technology (EST), or an eligible component includes “material assistance from a prohibited foreign entity” (PFE).

Andersen Consulting has entered into a Collaboration Agreement with Grinity, a built-asset consultancy delivering technical, environmental, and sustainable development services to construction and real estate markets.

Andersen Managing Director Joe Calianno, with Andersen’s International Tax practice, has been appointed to Tax Analyst’s Tax Notes Federal Council, an editorial advisory board that provides guidance to the commentary team of Tax Notes Federal publications, which are produced by the publisher Tax Analysts.

Washington State has entered a new tax era. As of October 1, 2025, many professional services including advertising, IT services, and temporary staffing are now treated as retailing activities and subject to retail sales tax.

Andersen Consulting adds depth to its platform through a Collaboration Agreement with Insight Consulting, a leading data and digital strategy consultancy with a presence in South Africa, Mozambique, and the UK.

Andersen Consulting strengthens its human capital practice through a Collaboration Agreement with Lansdowne Executive Search, a Dublin-based firm specializing in executive search, interim management and board level appointments.

Andersen Global reinforces its presence in Switzerland with the addition of new member firm Exactio, bolstering its global mobility capabilities and further enhancing its integrated, multidisciplinary professional services model.

Andersen Managing Director Bryan Collins is presenting at Practising Law Institute’s (PLI) Practical Guide to the Consolidated Tax Return Regulations 2026 on March 10-11, 2026, in New York.