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The following dates are for calendar-year filers. If you are a fiscal-year filer, see the form instructions for more information.

March

For Partnership (Form 1065 and Schedule K-1s) and S-Corporate (Form 1120S and Schedule K-1s) returns:

  • File returns or automatic 6-month extensions (Form 7004) by midnight Monday, March 16, 2020

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April

For Corporate (Form 1120) and Fiduciary (1041) returns:

  • File returns or automatic 6-month extensions (Form 7004) by midnight Wednesday, April 15, 2020. See July for more information.
  • Deposit the first installment of 2020 estimated tax by Wednesday, April 15, 2020. See July for more information.

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June

For Corporate (Form 1120) and Fiduciary (Form 1041) returns:

  • Deposit the second installment of 2020 estimated tax by Monday, June 15, 2020. See July for more information.

July

For Corporate (Form 1120) and Fiduciary (1041) returns:

  • File returns or automatic 6-month extensions (Form 7004) by midnight Wednesday, July 15, 2020.
  • Deposit the first installment of 2020 estimated tax by Wednesday, July 15, 2020.
  • Deposit the second installment of 2020 estimated tax by Wednesday, July 15, 2020.

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September

For Partnership (Form 1065) and S-Corporate (Form 1120S) returns, if you timely requested a 6-month extension in March:

  • File returns by midnight Tuesday, September 15, 2020.

For Fiduciary (Form 1041) returns, if you timely requested a 6-month extension in April:

  • File returns by midnight Wednesday, September 30, 2020.

For Corporate (Form 1120) and Fiduciary (Form 1041) returns:

  • Deposit the third installment of 2020 estimated tax by Tuesday, September 15, 2020.

October

For Corporate returns (Form 1120), if you timely requested a 6-month extension in April:

  • File returns by midnight Thursday, October 15, 2020.

December

For Corporate returns (Form 1120):

  • Deposit the fourth and final installment of 2020 estimated tax by Tuesday, December 15, 2020.

January

For Fiduciary returns (Form 1041):

  • Deposit the fourth and final installment of 2020 estimated tax by Friday, January 15, 2021.

State-specific information

Additional e-file and perfection period information

  • Remember to check the efile status on the return to ensure your return or extension is accepted by the taxing authority. If your return or extension is rejected, follow the guidelines below to ensure it remains timely filed.
  • Returns and extensions do not have to be Accepted by the IRS and/or states on March 16 to be considered timely filed. An electronic postmark is assigned to a return when it is received by the Intuit Electronic Filing Center. This electronic postmark is the date the return or extension is considered filed. This electronic postmark is reported as the Return Submitted date and time displayed.
  • The ERO should print the status from the program by copying the information and then pasting into a text editor. Submit this document with the paper return or extension.
  • The ERO is allowed 10 calendar days to resubmit a rejected e-file return.
  • The ERO is allowed 5 calendar days to resubmit a rejected e-file extension.
  • See Publication 4163 under the Transmission Perfection Period section for more information.

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