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Business Tax Deadlines

Business Tax Deadline

January 31, 2019

All Employers

Deadline to give employees their Form W-2 for 2018.

All Businesses

Give an annual information statement to recipients of certain payments you made during 2018. (You can use a copy of the appropriate Form 1099.)

February 15, 2019

All Businesses

Give an annual information statement to recipients of certain payments (e.g., proceeds from broker and barter transactions) you made during 2018. (You can use a copy of the appropriate Form 1099).

February 28, 2019

All Businesses

File an information return (Form 1099) with IRS for certain payments you made during 2018. 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, 2019.

March 15, 2019

C Corporation and S Corporations

File a 2018 calendar year income tax return (Form 1120 or 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 2019. If Form 2553 is filed late, S Corp treatment will begin with calendar year 2019 (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 2018 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 17, 2019.

Corporations

Deposit the first installment of estimated income tax for tax year 2019.

June 15, 2019

Corporations

Deposit the second installment of estimated income tax for tax year 2019.

July 31, 2019

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 2017. 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 17, 2019

C Corporations, S Corporations, and Partnerships

File a 2018 calendar year income tax return (Form 1120 or Form 1120S) 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 2019.

 

During November 2019

All Employers

Request that employees whose withholding exemptions will be different in 2019 fill out a new Form W-4.

December 17, 2019

Corporations

Deposit the fourth installment of estimated income tax for tax year 2019.