Here are some of the key tax-related deadlines affecting businesses and other employers during the third quarter of 2021. 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. Monday, August 2 Employers report income tax withholding and FICA taxes for second quarter 2021 (Form 941) and pay any tax due. Employers file a 2020 calendar-year retirement plan report (Form 5500 or Form 5500-EZ) or request an extension. Tuesday, August 10 Employers report income tax withholding and FICA taxes for second quarter 2021 (Form 941), if you deposited all associated taxes that were due in full and on time. Wednesday, September 15 Individuals...