A change of contact will not break the connection between QuickBooks Time and Intuit Practice Management powered by Karbon, but the work item within QuickBooks Time will not be found under the new contact (it will still be displayed as connected to the old contact). Therefore, you will need to move the work to the new client inside QuickBooks Time as well. If you don't do this, QuickBooks Time will continue to report the work item under the old client.