Important Tax Dates
When to pay estimated Taxes
Payment period: January 1 - March 31
Due date: April 15
Payment period: April 1 - May 31
Due date: June 15
Payment period: June 1- August 31
Due Date: September 15
Payment period: September 1 - December 31
Due date: January 15, of the following year
DOR Monthly State Taxes
Monthly returns are due the 25th of every month. (e.g the June tax return is due July 25.)
DOR Quarterly State Taxes
Quarterly returns are due the end of the month falling the tax quarter. (e.g the Quarter 1 (Jan, Feb, Mar) tax return is due April 30.)
DOR Annual State Taxes
Annual returns are due April 15. (e.g. The Annual 2019 tax return is due April 15, 2020)
If the due date falls on a weekend or legal holiday the date is extended to the next business day.