In this SCOTUSblog post, Alan Horowitz recaps the January 17 Supreme Court oral argument in United States v. Home Concrete and Supply Co. The case involves the scope of the extended six-year statute of limitations applicable when a taxpayer "omits from gross income an amount properly includible therein." The case presents two main issues: (1) whether that statutory language covers overstatements of tax basis, even though the Supreme Court construed the same phrase in a predecessor statute not to do so; and, (2) if the Court does not accept the government's statutory argument, whether it must defer to a recent Treasury regulation that adopts the government’s proffered interpretation.

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