For tax years beginning on or after January 1, 2016, Corporate Income Tax began following the federal due dates for corporate returns.
Corporations on a calendar year and a fiscal year, other than June 30, the original due date is the 15th day of the 4th month after the end of the tax year.
Corporations with a fiscal year ending on June 30, the original due date is the 15th day of the 3rd month following the end of its tax year.