In an earlier blog post, we discussed the US Tax Court’s ruling in QinetiQ U.S. Holdings, Inc. v. Commissioner, No. 14122-13 (Dec. 27, 2013). The taxpayer had argued that the Internal Revenue Service’s (IRS’) notice of deficiency containing a one-sentence reason for the deficiency determination violated the Administrative Procedure Act (APA) because it was “arbitrary, capricious, an abuse of discretion, or otherwise not in accordance with law.” The Tax Court disagreed, emphasizing that it was well settled that the court is not subject to the APA. To refresh, the APA provides a general rule that a reviewing court that is subject to the APA must hold unlawful and set aside an agency action unwarranted by the facts to the extent the facts are subject to trial de novo by the reviewing court. (more…)