Individuals: Pay the third installment of your estimated tax for 2010. Partnerships: File 2009 Form 1065 if you timely requested a 5-month extension. Corporations: File calendar year 2009 Form 1120 or 1120S if you timely requested a 6-month extension.
10/15/2010
Individuals: File 2009 Form 1040, 1040A, or 1040EZ If you timely requested a 6-month extension. Electing Large Partnerships: File 2009 Form 1065 if you timely requested a 6-month extension.
Individuals: Pay the third installment of your estimated tax for 2010. Partnerships: File 2009 Form 1065 if you timely requested a 5-month extension. Corporations: File calendar year 2009 Form 1120 or 1120S if you timely requested a 6-month extension.
10/15/2010
Individuals: File 2009 Form 1040, 1040A, or 1040EZ If you timely requested a 6-month extension. Electing Large Partnerships: File 2009 Form 1065 if you timely requested a 6-month extension.
11/10/2010
File Form 941 for the third quarter of 2010 if you timely deposited all required payments.
12/15/2010
Corporations: Deposit the fourth installment of your estimated tax for 2010.
