September 17 - S Corporations
File a 2017 calendar year income tax return (Form 1120S) 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 K-1 (Form 1120S) or a substitute Schedule K-1.
September 17 - Corporations
Deposit the third installment of estimated income tax for 2018 for calendar yearSeptember 17 - Social Security, Medicare and withheld income tax
Sign up for our newsletter.
Our expertise is widespread and we have multiple office locations to make it convenient for you to get help. You can find us at: