Estimated tax due for the 4th quarter of 2016 for those who do not pay their income tax throughout the year through withholding.
Employers must send out W-2 Forms and 1099 Forms to employees and non-employees who provide services.
If you claimed exemption from income tax withholding on the W-4 Form you gave your employer last year, you must file a new Form W-4 by this date to continue your exemption for another year.
Businesses must file paper copies of Form 1099 with the Internal Revenue Service.
Businesses must file “Form 1120” for the calendar year and pay any taxes due.
Individual income tax returns due for those who were given a 6-month extension to file income tax returns for 2016, along with any tax, interest, and penalties due.