April 21, 2017 @ 12:00 am - April 22, 2017 @ 12:00 am Deposit payroll tax for payments on Apr 15-18 if the semiweekly deposit rule applies.
April 20, 2017 @ 12:00 am - April 21, 2017 @ 12:00 am Deposit payroll tax for payments on Apr 12-14 if the semiweekly deposit rule applies.
April 18, 2017 @ 12:00 am - April 19, 2017 @ 12:00 am C corporations: Deposit the first installment of your 2017 estimated tax.