Tax Calendar: Federal Due Dates
Partnerships
March 17
Electing large partnerships. Provide each partner with a copy of Schedule K-1 (Form 1065-B), Partner's Share of Income (Loss) From an Electing Large Partnership, or a substitute Schedule K-1. This due date is effective for the first March 17 following the close of the partnership's tax year. The due date of March 17 applies even if the partnership requests an extension of time to file the Form 1065-B by filing Form 7004.
April 15
File a 2007 calendar year return (Form 1065). Provide each partner with a copy of Schedule K-1 (Form 1065), Partner’s Share of Income, Deductions, Credits, etc., or a substitute Schedule K-1. If you want an automatic 6-month extension of time to file the return and provide Schedule K-1 or a substitute Schedule K-1, file Form 7004. Then, file Form 1065 by October 15.
Electing large partnerships. File a 2007 calendar year return (Form 1065-B). If you want an automatic 6-month extension of time to file the return, file Form 7004. Then, file Form 1065-B by October 15. See March 17 for the due date for furnishing Schedules K-1 or substitute Schedules K-1 to the partners.
October 15
File a 2007 calendar year return (Form 1065). This due date applies only if you were given an additional 6-month extension. Provide each partner with a copy of Schedule K-1 (Form 1065) or a substitute Schedule K-1.
Electing large partnerships. File a 2007 calendar year return (Form 1065-B). This due date applies only if you were given an additional 6-month extension. See March 17 for the due date for furnishing Schedules K-1 or substitute Schedules K-1 to the partners.
If you operate on a fiscal year, see tax calendar information for Fiscal-Year Taxpayers.

