Taxable year

Definition and stakes

Portrait of Harlan F. Stone Harlan F. Stone,  Helvering v. Morgan's Inc. — Opinion of the Court

“ The term 'taxable year' means the calendar year, or the fiscal year ending during such calendar year, upon the basis of which the net income is computed under section 212 or 232 (section 953 or 984 of this title) . The term 'fiscal year' means an accounting period of twelve months ending on the last day of any month other than December. The term 'taxable year' includes, in the case of a return made for a fractional part of a year under the provisions of this title or under regulations prescribed by the commissioner with the approval of the Secretary, the period for which such return is made. ”
Source: Wikisource

Portrait of William O. Douglas William O. Douglas,  Robertson v. United States — Opinion of the Court

“ That history strongly suggests that the purpose was not to change the allowable period of allocation from one ending with the close of the taxable year to one covering any 36 months in the past when the work was done, but to prevent tax reduction by proration of income over a period of work greater than the duration of the work preceding the close of the taxable year. ”
Source: Wikisource

Portrait of James Clark McReynolds James Clark McReynolds,  Russell v. United States (278 U.S. 181…

“ The amount of income, excess-profits, and war-profits taxes imposed by the Revenue Act of 1921, and by such Act as amended, for the taxable year 1921 and succeeding taxable years, and the amount of income taxes imposed by this Act, shall be assessed within four years after the return was filed, and no proceeding in court for the collection of such taxes shall be begun after the expiration of such period. ”
Source: Wikisource

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