Hello, @bhancock42.
I'd be glad to help share some additional details about payroll tax calculation in QuickBooks.
Currently, we're unable to do a test computation of your employee's net pay in QuickBooks Online. You'll have to enter the Gross pay, hours worked, and salary.
However, we can use our free paycheck calculator. By using this tool it will help you calculate pay for all your workers, including hourly wage earners, salaried employees, and withholdings.
Just make sure your employees and payroll items should be set up correctly to ensure accurate calculation of wages and tax amounts.
See this article on how to use our Paycheck calculator: Calculate your paycheck in seconds.
Also, you can check out our Payroll 101. It provides additional information about the payroll process and answers some frequently asked questions in QuickBooks.
You can drop a comment below if you've got other questions in mind about payroll calculation in QuickBooks Online. I'm always here to help you out. Keep safe.