2021 Tax Calendar
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Stay up to date on key 2021 IRS form filing dates
This 2021 tax calendar is a reference document of dates included in the IRS Tax Calendar for Businesses and Self-Employed Individuals. View specific due dates by month for filing tax forms, paying taxes, and other actions required by federal tax law. Bookmark this website to track key 2021 tax deadlines and avoid penalties as well as late fees.
Important 2021 Tax Dates
February 1: Employer – Form W-2; Payors – Form 1099-NEC
March 1: Payors – Form 1099-MISC
March 15: Partnerships, LLCs – Form 1065; S Corporations – Form 1120S
April 15: Individuals – Form 1040; Estates and Trusts – Form 1041; FBAR – FinCen Form 114
May 17: Exempt Organizations – Forms 990
August 2: Employee Benefit Plans – Forms 5500
September 10 – Form 4070 (Aug. 2021)
September 15 – Form 1040-ES (2021 #3)
September 15 – Form 1065, Sched. K-1
September 15 – Form 1120-S, Sched. K-1
September 15 – Form 1120 (Jun. FY)
September 15 – Form 1120-W (2021 #3)
September 30 – Form 730 (Aug. 2021), 2290 (Aug. 2021)
Relevant Tax Management Portfolios
Portfolio 1240-1st
Income Taxes: Mergers and Acquisitions
This Portfolio addresses the state income and franchise tax considerations that should be taken into account in planning corporate acquisitions.
Portfolio 1110-3rd
Income Taxes: Definition of a Unitary Business
This Portfolio examines the unitary business concept and its importance to the application of formulary apportionment and to the resolution of the business-, non-business income issue.
Portfolio 1130-3rd
Income Taxes: Consolidated Returns and Combined Reporting
The Portfolio, Income Taxes: Consolidated Returns and Combined Reporting, compares state combined reports and state consolidated returns in detail and discusses the mechanics and implications of filing combined reports.
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