Small Business Tax Return Dates for 2019

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A summary of the 2019 tax return dates for small businesses by business type with links to IRS tax return forms.

Also included is information on tax extensions and due dates for 2020 estimated taxes.

Tax return dates and forms vary depending on business type. Below is a summary of the different business types, their tax return dates, and tax return forms.

  • Sole proprietorship and single-member LLC tax returns on with the owner’s personal income on Schedule C attached to Form 1040 or 1040-SR.
    Due April 15, 2020
  • Partnerships or limited liability corporations (LLC) with two or more members you file Form 1065 with Schedule K-1 for each partner.
    Due March 15, 2020
  • S corporations file Form 1120-S.
    Due March 15, 2020
  • Calendar year C corporations file Form 1120 for 2019.
    Due April 15, 2020
  • Personal income tax return (i.e. Form 1040 or 1040-SR) including Schedule C for sole proprietorships or Schedule F for farming businesses.
    Due April 15, 2020

An automatic 6-month filing extension is available for businesses that cannot file their tax returns by the tax return date due date for 2019 taxes. A request for an extension must be filed by the return’s due date.

Estimated Taxes

Estimated taxes is a method to pay tax on income that is not subject to withholding. This income includes earnings from self-employment, interest, dividends, rents, and alimony. Estimated taxes is a method where taxpayers can pay their taxes throughout the year. This can also be done electronically.

For the 2019 tax year the final estimated tax installment payment for the 2019 tax year is due on Jan 15th, 2020 if you are self-employed. This is for income received between September 1st through December 31st, 2019. Don’t send the first 2020 estimated tax installment payment with your 2010 income tax return. Self-employed includes sole proprietor, independent contractor, partner, or LLC member and you pay estimated taxes.

Throughout the 2020 tax year, estimated tax installment payment due dates are:

  • April 18, 2020
  • June 15, 2020
  • September 15, 2020
  • January 15, 2021

The final payment on January 15, 2021 does not have to be made if the income tax return is filed by January 31, 2021.

Farmers and fishermen on a calendar year and who receive at least two-thirds of their gross income from farming or fishing only have to make on estimated tax payment for 2019 that is due on January 15, 2020.

Avoid late payments by scheduling estimated taxes for Form 1040 or 1040-SR in advance. Payments can be scheduled up to 365 days in advance if you pay through You can learn more about this in IRS Publication 966.

Employment Tax Returns

Employer’s are required to file a quarterly return for the withholding of Social Security and Medicare (FICA) taxes. This is only applicable if you are employees on your payroll. The form used to file employment tax quarterly returns is Form 941.

Employment Tax Return due dates for 2020 are end of the month following the quarter that the return is applicable.

  • April 30, 2020
  • July 31, 2020
  • November 2, 2020 (October 31st is a Saturday)
  • February 1, 2021 (January 31 is a Sunday)

The due date is extended to the 10th day of the month following the end of the quarter if taxes have been paid in full and on time.

Please note that to switch from filling Form 944 (i.e. the annual form for filling Employment Tax Returns) to Form 941 is 2020 you have to get the IRS’s approval. To do this, you have until April to contact the IRS and request a change by calling 800-829-4933.

Fill federal unemployment annually via form 940; for the 2019 tax year is due on January 31st 2020. You can file Form 940 by February 10, 2020 if you deposited all of your federal unemployment tax when it was due.

Information Returns

For the 2019 tax year provide employees with W-2s and independent contractors with 1099-MISCs by January 31, 3020. Services performed by independent contractors in 2020 use Form 1099-NEC in 2020 instead of Form 1099-MISC. Jan 31st, 2020 is also the same due date for submitting W-2’s to the Social Security Administration and 1099-MISCs to the IRS.

Submit Form 8809 by January 31st to get a 30-day filing extension. However, please note that this is only granted in extreme situations such as a natural disaster or a fire.

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Employee Benefit Notices

Companies that offer employee benefit programs such as a 401(K) or an Individual Coverage Health Reimbursement Arrangement (ICHRA) need to provide notices to employees about their participation eligibility.

  • 401(K)s that begin on January 1, 2021, notices should be given by December 2, 2020. Notices can be given up to 90 days before the start of the new year.
  • A notice is required 90 days before the beginning of the ICHRA’s plan year for ICHRAs that begin on January 1, 2020.

IRS Online Calendar

View all of the IRS tax deadline dates by viewing the IRS online calendar. You can even set automated calendar reminders.

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