Individuals - If you have an automatic 6-month extension to file your income tax return for 2020, file Form 1040 and pay any tax, interest, and penalties due.
Corporations - File a 2020 calendar year income tax return (Form 1120) and pay any tax, interest, and penalties due. This due date applies only if you timely requested an automatic 6-month extension.
Employers - Nonpayroll withholding. If the monthly deposit rule applies, deposit the tax for payments in September.
Employers - Social Security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments in September.
Employers - Social Security, Medicare, and withheld income tax. File form 941 for the third quarter of 2021. Deposit any undeposited tax. (If your tax liability is less than $2,500, you can pay it in full with a timely filed return.) If you deposited the tax for the quarter in full and on time, you have until November 10 to file the return.
Certain Small Employers - Deposit any undeposited tax if your tax liability is $2,500 or more for 2021 but less than $2,500 for the third quarter.
Employers - Federal Unemployment Tax. Deposit the tax owed through October if more than $500.
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