12/15/2017 – Fourth quarter estimated payments for corporations due
01/15/2018 – Fourth quarter estimated payments for individuals due
03/15/2018 – Original Income tax filing deadline for partnerships and S Corporations
04/17/2018 – Original Income tax filing deadline for individuals and C Corporations
04/17/2018 – 1st Quarter 2018 estimated tax payments due
05/15/2018 – Original income tax filing deadline for exempt organizations (non-profits)
06/15/2018 – 2nd Quarter 2018 estimated tax payments due
08/15/2018 – Income tax deadline for exempt organizations (non-profits) with extensions filed
09/17/2018 – 3rd Quarter 2018 estimated tax payments due
09/17/2018 – Income tax deadline for partnerships and S Corporations with extensions filed
10/15/2018 – Income tax deadline for individuals and C Corporations with extensions filed
12/17/2018 – 4th Quarter 2018 estimated tax payments due for Corporations
01/15/2019 – 4th Quarter 2018 estimated tax payments due for Individuals
