Your business tax return is due on the 15th day of the fourth month following the end of your fiscal year. For example, if your fiscal year coincides with the calendar year, then your return will be due on April 15.
If the due date falls on a weekend or holiday, the due date is extended through the next business day.
For the tax period ending December 2019, the due date for filing and paying business taxes is extended until June 15, 2020. Currently-held business licenses that show an expiration date of May 15, 2020 are valid through July 15, 2020.