April 17, 2018 @ 12:00 am - April 18, 2018 @ 12:00 am Employers: Employees are required to report to you tips of $20 or more earned during March.
April 17, 2018 @ 12:00 am - April 18, 2018 @ 12:00 am Corporations: File Form 1120 for calendar year and pay any tax due. For automatic 6-month extension, file Form 7004 and deposit estimated tax.
April 17, 2018 @ 12:00 am - April 18, 2018 @ 12:00 am Deposit payroll tax for Mar if the monthly deposit rule applies.