A duplicate employee has appeared. Can you delete it for me please?

Welcome to the Community, @spaa2.

Let me help you delete a duplicate employee in your QuickBooks Online.

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. Click Edit Employee.
5. Click Delete employee.
6. Then, click Yes to confirm.

If you need some procedures or steps when using QuickBooks Online, you can use this link to search for an article that would help you. Help articles.  

Please reach out again if you have any other questions. Keep safe!