How do I delete an employee from payroll. I mistakenly added person to payroll.

Hello, @klozier.

Let me help you delete an employee in QuickBooks Payroll.

Here’s how.

1. Go to the Payroll menu.
2. Select the Employees tab.
3. Select the employee's name. If the employee isn't on the list, select All employees from the Active Employees dropdown.
4. Select Edit Employee.
5. Select Delete employee.
6. Select Yes to confirm the deletion.

Please know if you already created a paycheck to an employee, it cannot be deleted. You can only make it inactive. 

In case you want to delete a whole pay run, check out this article, Deleting a pay run in QuickBooks Online Standard Payroll. You can use this article as your guide when deleting a payroll. 

Feel free to fill me in if you have any other questions. Keep safe.