« All Events Form 1120ES – 3rd Qtr September 15|Recurring Event (See all)An event every year that begins at 12:00 am on day 15 of September, repeating indefinitely « Texas Franchise due if extension was filed – consult with your DP tax accountant Forms 1065 & 1120S (Calendar Year) if extension was filed » + Google Calendar+ iCal Export Details Date: September 15