| Thu | 1 | Farmers and Fisherman: File 2011Form 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. |
| Fri | 2 | Deposit payroll tax for payments on Feb 25-28 if the semiweekly deposit rule applies. |
| Wed | 7 | Deposit payroll tax for payments on Feb 29 – Mar 2 if the semiweekly deposit rule applies. |
| Fri | 9 | Deposit payroll tax for payments on Mar 3-6 if the semiweekly deposit rule applies. |
| Mon | 12 | Employers: Employees are required to report to you tips of $20 or more earned during February. |
| Wed | 14 | Deposit payroll tax for payments on Mar 7-9 if the semiweekly deposit rule applies. |
| Thu | 15 | 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. |
| Thu | 15 | Employers: Deposit payroll tax for Feb. if the monthly deposit rule applies. |
| Thu | 15 | 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. |
| Thu | 15 | Electing Large Partnerships: Furnish Sch. K-1 (Form 1065-B) to each partner. |
| Fri | 16 | Deposit payroll tax for payments on Mar 10-13 if the semiweekly deposit rule applies. |
| Wed | 21 | Deposit payroll tax for payments on Mar 14-16 if the semiweekly deposit rule applies. |
| Fri | 23 | Deposit payroll tax for payments on Mar 17-20 if the semiweekly deposit rule applies. |
| Wed | 28 | Deposit payroll tax for payments on Mar 21-23 if the semiweekly deposit rule applies. |
| Fri | 30 | Deposit payroll tax for payments on Mar 24-27 if the semiweekly deposit rule applies. |
| Sat | 31 | File Form 2290 and pay the tax for vehicles first used in February. |
| Sat | 31 | File Form 730 and pay the tax on wagers accepted during February. |