Key Dates in September 2024
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Corporations Corporations
September 15, 2024Corporations – Deposit the third installment of your estimated income tax. A worksheet, Form 1120-W, is available to help you make an estimate of your tax for the year.
Electing large partnerships Electing large partnerships
September 15, 2024Electing large partnerships – File Form 1065-B. This due date applies only if you were given an additional 6-month extension. See March 15 for the due date for furnishing the Schedules K-1 to the partners.
Employers Employers Employers
September 15, 2024Employers – Social Security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments in August.
Individuals Individuals
September 15, 2024
Individuals – Make a payment of your current year 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 the current year.
Partnerships S Corporations S Corporations
September 15, 2024S Corporations – File Form 1120S and pay any tax due. This due date applies only if you timely requested an automatic 6-month extension. Otherwise, see March 15. Provide each shareholder with a copy of Schedule K-1 (Form 1120S) or a substitute Schedule K-1.
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Trusts and Estates Trusts and Estates
September 30, 2024Trusts and Estates – File Form 1041. This due date applies only if you were given an additional 5-month extension. Otherwise, see April 15.
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