A warm welcome to the Community, @N2TRIS.

I'd be happy to lend a helping hand in setting up and assigning different classes to your employees.

Before you can set up and assign different classes to your employees, you'll need to turn on this feature in your QuickBooks Online Account. Please know that this feature is only available in QuickBooks Online Plus.

To turn on:

1. Click the Gear icon.
2. Select Account and Settings.
3. In the navigational bar, click Advanced.
4. Select Categories.
5. Check off Track classes to turn on class tracking.
6. Click Save and then Done.

Here's how to set up classes:

1. Click the Gear icon and All Lists.
2. Select Classes. ( You can also add locations by selecting Locations.)
3. Click the New button.
4. Add the name of the class or location and click Save.

To add class tracking to payroll:

1. Click the Gear icon.
2. Under Settings, select Payroll Settings.
3. On the Setup Overview page, click on Accounting under Preferences.
4. If prompted, Click Customize. If not, scroll down at the bottom of the screen to see the Classes section.
5. Select the option that will best fit your preference for class tracking.

To know more about class tracking, here's a recommended article: Set up and work with class and location tracking.

Should you need further assistance, please let me know. Have a great day.