Filing deadlines
March 15S corporations & partnershipsForms 1120-S & 1065
April 15Individuals, C corporations, trusts & estatesForms 1040, 1120 & 1041
May 15Tax-exempt organizationsForms 990 / 990-EZ / 990-PF
On extension
September 15S corporations & partnerships
September 30Trusts & estates
October 15Individuals & C corporations
November 15Tax-exempt organizations