Dates Categories Tax Dates Agenda Agenda Day Month Week March – October 2021 Mar – Oct 2021 Collapse All Expand All Mar 15 Mon 2021 Foreign Trusts with U.S. Owner Form 3520-A due Tickets Mar 15 all-day Partnership Form 1065 due Tickets Mar 15 all-day S Corporation Form 1120S due Tickets Mar 15 all-day Mar 31 Wed 2021 1099 due (filed electronically) Tickets Mar 31 all-day Apr 15 Thu 2021 C Corporation Form 1120 due Tickets Apr 15 all-day Individual Form 1040 due Tickets Apr 15 all-day FinCEN Report 114 due Tickets Apr 15 all-day Trust and Estate Form 1041 due Tickets Apr 15 all-day Apr 30 Fri 2021 1st Quarter Payroll Reports due Tickets Apr 30 all-day May 15 Sat 2021 Form 990 Due Tickets May 15 all-day Last day for exempt organizations to file 2013 income tax returns unless 3 month extension is requested. Exempt Organizations Form 990 due Tickets May 15 all-day Jul 31 Sat 2021 2nd Quarter Payroll Reports Due Tickets Jul 31 all-day Employee Benefit Plans Form 5500 due Tickets Jul 31 all-day Sep 15 Wed 2021 C Corporation Form 1120 extension Tickets Sep 15 all-day Foreign Trusts with U.S. Owner Form 3520-A extension Tickets Sep 15 all-day Partnership Form 1065 extension Tickets Sep 15 all-day S Corporation Form 1120S extension Tickets Sep 15 all-day Sep 30 Thu 2021 Trust and Estate Form 1041 extension Tickets Sep 30 all-day Oct 15 Fri 2021 Individual Form 1040 extension Tickets Oct 15 all-day Employee Benefit Plans Form 5500 extension Tickets Oct 15 all-day March – October 2021 Mar – Oct 2021 Subscribe to filtered calendar Add to Timely Calendar Add to Google Add to Outlook Add to Apple Calendar Add to other calendar Export to XML