September 2024 tax and compliance deadlines

Now that the children are back in school and you’ve had some great adventures over the summer, it’s time to get back to work. Along the way, be sure to attention to these important tax deadlines in September, and pass this list along to your clients.

In September, it is recommended that you:

• Schedule appointments with individual clients for year­-end tax planning sessions.
• Remind individual clients and C corporations of extended Oct. 15 filing deadline for 2024 returns.
• File returns for calendar-year S corporations and partnerships that obtained automatic extensions.

Key Compliance Dates

Thursday, Sept. 5—Semiweekly depositors deposit FICA and withheld income tax on wages paid on August 28-30.

Friday, Sept. 6—Semiweekly depositors deposit FICA and withheld income tax on wages paid on August 31-Sept. 3.

Tuesday, Sept. 10—Tipped employees who received $20 or more in tips during August report them to the employer on Form 4070, Employee’s Report of Tips to Employer.

Wednesday, Sept. 11—Semiweekly depositors deposit FICA and withheld income tax on wages paid on Sept. 4-6.

Friday, Sept. 13—Semiweekly depositors deposit FICA and withheld income tax on wages paid on Sept. 7-10.

Monday, Sept. 16:

• Individuals: Make a payment of your 2024 estimated tax if you’re not paying your income tax for the year through withholding (or won’t pay in enough tax that way). Use Form 1040-ES. This is the third installment date for estimated tax in 2024.
• Partnerships: File a 2023 calendar year return (Form 1065, U.S. Return of Partnership Income). This due date applies only if you timely requested an automatic 6-month extension. Otherwise, see Partnerships under March 16.
• S corporations: File a 2023 calendar year income tax return (Form 1120-S, U.S. Income Tax Return for a U.S. Corporation) and pay any tax, interest, and penalties due. This due date applies only if you timely requested an automatic 6-month extension of time to file the return.
• Corporations: Deposit the third installment of estimated income tax for 2024. A worksheet, Form 1120-W, Estimated Tax for Corporations, is available to help you estimate your tax for the year.
• Social Security, Medicare, and withheld income tax: If the monthly deposit rule applies, deposit the tax for payments made in August.
• Monthly depositors deposit FICA and withheld income tax for August.

Wednesday, Sept. 18—Semiweekly depositors deposit FICA and withheld income tax on wages paid on Sept. 11-13.

Wednesday, Sept. 20—Semiweekly depositors deposit FICA and withheld income tax on wages paid on Sept. 14-17.

Wednesday, Sept. 25—Semiweekly depositors deposit FICA and withheld income tax on wages paid on Sept. 18-20.

Friday, Sept. 27—Semiweekly depositors deposit FICA and withheld income tax on wages paid on Sept. 21-24.

Intuit® Accountant Resources

• The September 2024 calendar with filing deadlines and reminders for you and your clients.
• Intuit Tax Guide 2024
• Tax law changes for tax year 2023
• IRS annual inflation adjustments for tax years 2023 and 2024
• Key Tax Facts for 2024
• Key Tax Facts for 2023-24