Major tax deadlines for March
March 2 Large employers and others must furnish Form 1095-B or Form 1095-C to employees. March 15 2016 calendar-year S corporation Form 1120S income tax returns are due. 2016 calendar-year partnerships Form 1065 income tax returns are due. March 31 Forms 1095-B and 1095-C due to the IRS, if filing electronically. Employers who have 250 or more employees are required to file electronically.