Here are some of the key tax-related deadlines affecting businesses and other employers during the third quarter of 2018. Keep in mind that this list isn’t all-inclusive, so there may be additional deadlines that apply to you. Contact us to ensure you’re meeting all applicable deadlines and to learn more about the filing requirements.
July 31
• Report income tax withholding and FICA taxes for second quarter 2018 (Form 941), and pay any tax due. (See the exception below, under “August 10.”)
• File a 2017 calendar-year retirement plan report (Form 5500 or Form 5500-EZ) or request an extension.
August 10
• Report income tax withholding and FICA taxes for second quarter 2018 (Form 941), if you deposited on time and in full all of the associated taxes due.
September 17
• If a calendar-year C corporation, pay the third installment of 2018 estimated income taxes.
• If a calendar-year S corporation or partnership that filed an automatic six-month extension:
• File a 2017 income tax return (Form 1120S, Form 1065 or Form 1065-B) and pay any tax, interest and penalties due.
---
The information contained in the Knowledge Center is intended solely to provide general guidance on matters of interest for the personal use of the reader, who accepts full responsibility for its use. In no event will CST or its partners, employees or agents, be liable to you or anyone else for any decision made or action taken in reliance on the information in this Knowledge Center or for any consequential, special or similar damages, even if advised of the possibility of such damages.