Tax filing reminders
September 17 – Third quarter installment of 2012 individual estimated income tax is due. September 17 – Filing deadline for 2011 tax returns for calendar-year corporations that received an automatic extension of the March 15 filing deadline. September 17 – Filing deadline for 2011 partnership tax returns that received an extension of the April 17 filing deadline. October 1 – Generally, the deadline for businesses to adopt a SIMPLE retirement plan for 2012. October 15 –