Form 1065 (MFT 06) Return and Extension Due Dates
Internal Revenue Manual Part 3. Submission Processing · 2026-10-03 edition · updated 2026-10-04 · United States
Form 1065 , U.S. Return of Partnership Income, is generally required to have a tax year that conforms to the majority of its partners. The Form 1065 is due on or before the 15th day of the third month following the close of the tax year. An 6-month extension of time to file is granted if the taxpayer completes Form 7004 properly and submits it by the due date of the Form 1065. Estimated tax payments are not required. See the table below for return and extended due dates.
Period Ending
Return Due Date
Extended Due Date
January
4/15
10/15
February
5/15
11/15
March
6/15
12/15
April
7/15
1/15
May
8/15
2/15
June
9/15
3/15
July
10/15
4/15
August
11/15
5/15
September
12/15
6/15
October
1/15
7/15
November
2/15
8/15
December
3/15
9/15
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