Abstract: This calendar notes important tax deadlines for the third quarter of 2021.

Tax calendar

July 15 — If the monthly deposit rule applies, employers must deposit the tax for payments in June for Social Security, Medicare, withheld income tax and nonpayroll withholding.

August 2 — The second quarter Form 941 (“Employer’s Quarterly Federal Tax Return”) is due today. (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 August 10 to file the return.

August 16 — If the monthly deposit rule applies, employers must deposit the tax for payments in July for Social Security, Medicare, withheld income tax and nonpayroll withholding.

September 15 — Third quarter estimated tax payments are due for individuals, trusts, and calendar-year corporations and estates.

· If an extension was obtained, partnerships should file their 2020 Form 1065 by this date.

· If an extension was obtained, calendar-year S corporations should file their 2020 Form 1120S by this date.

· If the monthly deposit rule applies, employers must deposit the tax for payments in August for Social Security, Medicare, withheld income tax and nonpayroll withholding.

September 30 — Calendar-year trusts and estates on extension must file their 2020 Form 1041.

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