October 5

Employers. Employers deposit Social Security, Medicare, and withheld income tax for September 28, 29, and 30.

October 7

Employers. Employers deposit Social Security, Medicare, and withheld income tax for October 1, 2, 3, and 4.

October 11

Employees who work for tips. Employees who received $20 or more in tips during September must report them to their employer. Form 4070 may be used.

October 14

Employers. Employers deposit Social Security, Medicare, and withheld income tax for October 6, 7, and 8.

October 17

Individuals. Individuals who received an automatic 6 month extension to file a 2010 calendar year income tax return must file and pay tax, interest, and any penalties due.

Partnerships. Electing large partnerships that received an automatic 6 month extension to file a 2010 calendar year income tax return on Form 1065-B, U.S. Return on Income for Electing Large Partnerships, must file.

Employers. Monthly depositors must deposit Social Security, Medicare, and withheld income tax for September.

October 19

Employers. Employers deposit Social Security, Medicare, and withheld income tax for October 12, 13, and 14.

October 21

Employers. Employers deposit Social Security, Medicare, and withheld income tax for October 15, 16, 17, and 18.

October 26

Employers. Employers deposit Social Security, Medicare, and withheld income tax for October 19, 20, and 21.

October 28

Employers. Employers deposit Social Security, Medicare, and withheld income tax for October 22, 23, 24, and 25.

October 31

Employers. Employers file Form 941 for the third quarter of 2010.

Employers. Employers deposit federal unemployment tax if liability for amounts owed year-to-date through September exceeds $500.

Residents living in a disaster zone should check the IRS list of disaster areas where deadlines have been postponed.

If and only to the extent that this publication contains contributions from tax professionals who are subject to the rules of professional conduct set forth in Circular 230, as promulgated by the United States Department of the Treasury, the publisher, on behalf of those contributors, hereby states that any U.S. federal tax advice that is contained in such contributions was not intended or written to be used by any taxpayer for the purpose of avoiding penalties that may be imposed on the taxpayer by the Internal Revenue Service, and it cannot be used by any taxpayer for such purpose.