In Moore v. U.S. (36 F. 4th 930), the U.S. Supreme Court ruled on a constitutional challenge of IRC section 965, the mandatory repatriation tax (MRT). The MRT is a one-time repatriation tax (or “deemed dividend”) that passes through undistributed accumulated income of U.S.-controlled foreign corporations (CFCs). Section 965 is part of the 2017 Tax Cuts and Jobs Act (P.L. 115-97), which addresses foreign business earnings, including CFCs, inversions and the GILTI tax. The Act generally taxes U.S. shareholders owning 10% or more of a foreign corporation on otherwise tax-deferred foreign earnings.