| 2/28/2012 |
| | File information returns, including Forms 1098, 1099 and W-2G for payments made during 2011. |
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| 3/1/2012 |
| | Farmers and fishermen: File 2011 Form 1040 and pay any tax due. However, you have until Apr 17 to file if you paid your 2011 estimated tax payments by Jan 15, 2012. |
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| 3/15/2012 |
| | Corporations: File Form 1120 for 2011 calendar year and pay any tax due. For automatic 6-month extension, file Form 7004 and deposit estimated tax. |
| | S Corporations: File Form 1120S for 2011 calendar year and pay any tax due. Furnish a copy of Sch. K-1 to each shareholder. File Form 2553 to elect S Corporation status beginning with calendar year 2012. |
| | Electing Large Partnerships: Furnish Sch. K-1 (Form 1065-B) to each partner. |
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| 4/17/2012 |
| | Corporations: Deposit the first installment of your estimated tax for 2012. |
| | Individuals: File 2011 Form 1040, 1040A, or 1040EZ. For automatic 6-month extension file Form 4868 and deposit estimated tax. Pay the first installment of 2012 estimated tax. |
| | Partnerships: File 2011 Form 1065 and furnish a copy of Sch. K-1 to each partner. |
| | Electing Large Partnerships: File 2011 Form 1065 calendar year return. |
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| 6/15/2012 |
| | Corporations: Deposit the second installment of your 2012 estimated tax. |
| | Individuals outside the U.S.: File 2011 Form 1040. |
| | Individuals: Pay the second installment of estimated tax for 2012. |
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| 9/17/2012 |
| | Individuals: Pay the third installment of your estimated tax for 2012. |
| | Partnerships: File 2011 Form 1065 if you timely requested a 5-month extension. |
| | Corporations: File calendar year 2011 Form 1120 or 1120S if you timely requested a 6-month extension. |
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| 10/15/2012 |
| | Individuals: File 2011 Form 1040, 1040A, or 1040EZ if you timely requested a 6-month extension. |
| | Electing Large Partnerships: File 2011 Form 1065 if you timely requested a 6-month extension. |
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| 12/17/2012 |
| | Corporations: Deposit the fourth installment of your estimated tax for 2012. |
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