« All Events Event Series Event Series: Form 1040ES – 3rd Qtr Form 1040ES – 3rd Qtr September 15, 2027 « Texas Franchise due if extension was filed – consult with your DP tax accountant Form 1041 if extension filed » Add to calendar Google Calendar iCalendar Outlook 365 Outlook Live Details Date: September 15, 2027 Series: Form 1040ES – 3rd Qtr