Hello there, medicuscme.
Thanks for checking in with us. Let's get this straightened out for you.
You can setup taxes in QuickBooks Online for your employee. However, I recommend contacting your State to know what are specific taxes that should be assigned to your employee.
Once done, you can use the work location feature and assign the employee to the corresponding work location. A work location is where employees perform most of their job duties.
Once you have the information, I'd like to walk you through on how to set up work locations in QuickBooks Online:
To add a work location:
To assign employees to the new location:
To know more about work locations in QuickBooks Online, you can check out this article: Set up and assign a new work location.
In case you need assistance from a live support, I'd recommend calling our QuickBooks Online Payroll Support Team. They can help you in setting up work location.
That's it. Please know that I'm only a post away if you have further questions in QBO.