Business Tax Deadlines
January 31, 2021
All Employers
Deadline to give employees their Form W-2 for 2020.
All Businesses
Give an annual information statement to recipients of certain payments you made during 2020. (You can use a copy of the appropriate Form 1099.)
February 15, 2021
All Businesses
Give an annual information statement to recipients of certain payments (e.g., proceeds from broker and barter transactions) you made during 2020. (You can use a copy of the appropriate Form 1099).
February 28, 2021
All Businesses
File an information return (Form 1099) with IRS for certain payments you made during 2020. There are different versions of Form 1099 for different types of payments. Use a separate Form 1096 to summarize and transmit each separate version. For a 30-day extension of time to file, use Form 8809. The due date for electronic filers is April 2, 2021.
March 15, 2021
S Corporations
File a 2020 calendar year income tax return (Form 1120S) and pay any tax still due. If you want an automatic 6-month extension, file Form 7004 and deposit what you estimate you owe.
S Elections
File Form 2553 to choose to be treated as an S corporation, beginning with calendar year 2021. If Form 2553 is filed late, S Corp treatment will begin with calendar year 2021 (unless the taxpayer qualifies for late election relief).
Electing Large Partnerships
Provide each partner with a copy of Schedule K-1 of Form 1065.
Partnerships
File a 2020 calendar year return (Form 1065) and provide each partner with a copy of Schedule K-1. If you want an automatic 6-month extension to file the return and provide Schedule K-1 or a substitute Schedule K-1, file Form 7004. Then file Form 1065 by September 15, 2021.
Corporations
Deposit the first installment of estimated income tax for tax year 2021.
April 15, 2021
C Corporations
File a 2020 calendar year income tax return (Form 1120 ) and pay any tax still due. If you want an automatic 6-month extension, file Form 7004 and deposit what you estimate you owe.
June 15, 2021
Corporations
Deposit the second installment of estimated income tax for tax year 2021.
July 31, 2021
All Employers
If you maintain an employee benefit plan, such as a pension, profit-sharing, or stock bonus plan, file Form 5500-EZ for calendar year 2020. If you use a fiscal year as your plan year, file the form by the last day of the seventh month after the plan.
September 15, 2021
S Corporations, and Partnerships
File a 2020 calendar year income tax return (Form 1120S or Form 1065) and pay any tax due if you were given an automatic 6-month extension.
Corporations
Deposit the third installment of estimated income tax for tax year 2021.
October 31, 2021
C Corporations
File a 2020 calendar year income tax return (Form 1120) and pay any tax due if you were given an automatic 6-month extension.
During November 2021
All Employers
Request that employees whose withholding exemptions will be different in 2021 fill out a new Form W-4.
December 15, 2021
Corporations
Deposit the fourth installment of estimated income tax for tax year 2021.