Hi there, @cindyherrmann1.
Happy to know that the steps provided by my colleague GarlynGay worked on your end and was able to assign a class to each employee successfully.
For more information about class tracking in QuickBooks Online, you may check this article: How to set up and use class and location tracking.
Please know that I'm always here to help you if you have any other payroll concerns, just add a post/comment below. Have a great day ahead!