September 2020 Tax Due Dates

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September 15

  • Individuals – Make a payment of your 2020 estimated tax if you are not paying your income tax for the year through withholding (or will not pay in enough tax that way). Use Form 1040-ES. This is the third installment date for estimated tax in 2020.
  • Partnerships – File a 2019 calendar year income tax return (Form 1065). This due date applies only if you were given an additional 6-month extension. Provide each shareholder with a copy of Schedule K-1 (Form 1065) or a substitute Schedule K-1.
  • S corporations – File a 2019 calendar year income tax return (Form 1120S) and pay any tax due. This due date applies only if you made a timely request for an automatic 6-month extension. Provide each shareholder with a copy of Schedule K-1 (Form 1120S) or a substitute Schedule K-1.
  • Corporations – Deposit the third installment of estimated income tax for 2020. A worksheet, Form 1120-W, is available to help you make an estimate of your tax for the year.
  • Employers – Nonpayroll withholding. If the monthly deposit rule applies, deposit the tax for payments in August.
  • Employers – Social Security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments in August.

Any accounting, business or tax advice contained in this article, is not intended as a thorough, in-depth analysis of specific issues, nor a substitute for a formal opinion, nor is it sufficient to avoid tax-related penalties. If desired, we would be pleased to perform the requisite research and provide you with a detailed written analysis. Such an engagement may be the subject of a separate engagement letter that would define the scope and limits of the desired consultation services.