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Regulations: Return due dates, extended due date amendments

Return due dates, extended due date amendments

The U.S. Treasury Department and IRS today released for publication in the Federal Register final and temporary regulations (T.D. 9821), and by cross-reference, proposed regulations (REG-128483-15) that update existing provisions to reflect the due dates and extensions of time to file certain tax returns and information returns.


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The temporary regulations [PDF 239 KB] and proposed regulations [PDF 245 KB] update existing rules to reflect statutory requirements of legislation enacted in 2015 that revised the due date for filing income tax returns of C corporations and partnerships.


The regulations provide:

  • Income tax returns of C corporations—except for a C corporation that has a tax year that ends on June 30—the last date for filing is the 15th day of the fourth month following the close of the tax year
  • A seven-month automatic extension of time to file the income tax return of any C corporation with a tax year that ends on June 30 and before January 1, 2026 (a six-month automatic extension of time to file a return applies for all other corporations)
  • A rule for the extension of time for the return for a short period that ends on any day in June, that treats the period as if it ended on June 30
  • Income tax returns of partnerships due by the 15th day of the third month following the close of the tax year (March 15 for calendar year partnerships)
  • A six-month automatic extension to file Form 1065 by partnerships
  • An extension of time for estates and trusts to file Form 1041 of five and one-half months (September 30 for calendar year filers)
  • A six-month automatic extension of time to file certain returns (Form 990 series) by exempt organizations

The preamble to the regulations explains what items are not addressed, such as the time for filing the FBAR (FinCEN Report 114, Report of Foreign Bank and Financial Accounts).

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