| Thu | 6 | Deposit payroll tax for payments on Aug 29-31 if the semiweekly deposit rule applies. |
| Fri | 7 | Deposit payroll tax for payments on Sep 1-4 if the semiweekly deposit rule applies. |
| Mon | 10 | Employers: Employees are required to report to you tips of $20 ore more earned during August. |
| Wed | 12 | Deposit payroll tax for payments on Sep 5-7 if the semiweekly deposit rule applies. |
| Fri | 14 | Deposit payroll tax for payments on Sep 8-11 if the semiweekly deposit rule applies. |
| Mon | 17 | Deposit payroll tax for Aug if the monthly deposit rule applies. |
| Mon | 17 | Individuals: Pay the third installment of your estimated tax for 2012. |
| Mon | 17 | Partnerships: File 2011 Form 1065 if you timely requested a 5-month extension. |
| Mon | 17 | Corporations: File calendar year 2011 Form 1120 or 1120S if you timely requested a 6-month extension. |
| Mon | 17 | Deposit third installment of your 2012 estimated tax. |
| Wed | 19 | Deposit payroll tax for payments on Sep 12-14 if the semiweekly deposit rule applies. |
| Fri | 21 | Deposit payroll tax for payments on Sep 15-18 if the semiweekly deposit rule applies. |
| Wed | 26 | Deposit payroll tax for payments on Sep 19-21 if the semiweekly deposit rule applies. |
| Fri | 28 | Deposit payroll tax for payments on Sep 22-25 if the semiweekly rule applies. |