Thank you for joining this thread and sharing some details about your concern, Olivier555.

I'd like to share what I know about service items assigned to your employees in QuickBooks Time.

The QuickBooks Online integration offers an automatic import of any new or edited information in QuickBooks Online to QuickBooks Time. That being said, the information you entered in QuickBooks Online automatically sync to QuickBooks Time.

To activate/deactivate the service item per employee, you'll need to go their weekly timesheet in QuickBooks Online and manually add or remove the details.

Here's how:

1. Click on +New.
2. Choose Weekly timesheet.
3. Select the employee's name. Also, take note of the week/period you selected.
4. Under Details section, remove the customer name and service items to deactivate it or add the customer name and service item to activate it.
5. Click on Save or Save and close.

Once you've made the changes, QuickBooks automatically imports the changes for the service items to QuickBooks Time. I've added this link that you can use as a reference: Enter a weekly timesheet in QuickBooks Online.

You can check out this article to learn more about the integration: About QuickBooks integration preferences in QuickBooks Time.

Let me know how it goes by tagging my name on your next response. I'll be around if you need help. Have a great week!