On January 25, 2021, the Tax Court issued its opinion in Adams Challenge UK Limited v. Commissioner (156 T.C. No. 3). The underlying issue presented in Adams Challenge UK Limited v. Commissioner was whether the IRS erred in disallowing the petitioner’s deductions and credits and whether the IRS’s action violated the business profits and the nondiscrimination articles of the bilateral income tax treaty between the United States and the U.K. Background to Adams Challenge UK Limited