12-31-11  Last chance for 2011 deductions
12-31-11  Last chance for IRA withdrawals
01-16-12  4th 2011 estimated tax payments due
01-31-12  W-2's and 1099's due to recipients
01-31-12  Employer quarterly & annual payroll reports due
02-29-12  W-2's and 1099's due to IRS
03-15-12  Corporate calendar year tax returns due
04-16-12  2011 individual & partnership tax returns due

04-16-12  1st 2012 estimated tax payments due
04-16-12  Last day for 2011 IRA contributions
06-15-12  2nd 2012 estimated tax payments due
09-17-12  Corporate calendar year extended tax returns due
09-17-12  3rd 2012 estimated tax payments due
12-31-12  Last chance for 2012 deductions
12-31-12  Last chance for 2012 IRA withdrawals
01-15-13  4th 2012 estimated tax payments due