All due dates assume that the date falls on a business day. If the due date falls on a holiday or weekend, the due date will be the next business day.
- This event has passed.
April 16, 2018 - April 17, 2018
If you are not paying your current year income tax through withholding (or will not pay in enough tax during the year that way), pay the first installment of your current estimated tax. Use Form 1040-ES.