Learning Center

September 2024 Business Due Dates

September 16 - S Corporations
File a 2023 calendar year income tax return (Form 1120-S) and pay any tax due. This due date applies only if you requested an automatic 6-month extension. Provide each shareholder with a copy of their Schedule K-1 (Form 1120-S) or a substitute Schedule K-1 and, if applicable, Schedule K-3 (Form 1120-S) or substitute Schedule K-3 (Form 1120-S).

September 16 - Corporations 

Deposit the third installment of estimated income tax for 2023 calendar year

September 16 -  Social Security, Medicare and withheld income tax

If the monthly deposit rule applies, deposit the tax for payments in August.

September 16 - Nonpayroll Withholding

If the monthly deposit rule applies, deposit the tax for payments in August.

September 16 - Partnerships

File a 2023 calendar year return (Form 1065). This due date applies only if you were given an additional 5-month extension. Provide each partner with a copy of K-1 (Form 1065) or a substitute Schedule K-1.

September 30 - Fiduciaries of Estates and Trusts

File a 2023 calendar year return (Form 1041). This due date applies only if you were given an extension of 5 1/2 months. If applicable, provide each beneficiary with a copy of K-1 (Form 1041) or a substitute Schedule K-1.

Weekends & Holidays:

If a due date falls on a Saturday, Sunday or legal holiday, the due date is automatically extended until the next business day that is not itself a legal holiday. 

Disaster Area Extensions:

Please note that when a geographical area is designated as a disaster area, due dates will be extended. For more information whether an area has been designated a disaster area and the filing extension dates visit the following websites:

FEMA: https://www.fema.gov/disaster/declarations
IRS
https://www.irs.gov/newsroom/tax-relief-in-disaster-situations

Share this article...
Have Questions? Check out the frequently asked questions below, or contact us for support.
Hello, the TaxLAB Bot can help answer your common questions 24/7. For other questions not listed here, check out our FAQ page or use the Ask Me A Question form and one of our staff will respond within 48 hours.
Please fill out the form and our team will get back to you shortly The form was sent successfully