This response doesn't even make sense. When you add a time tracking user, you have to select from a dropdown list of vendors and employees. So "If the name the customer trying to use is already present in QBO as an vendor, contractor or employee that is a reason the addition of a time tracking only user would fail." is suggesting the impossible. There's no way to enter a completely new name from that screen. Just more incompetence from the Quickbooks "Help" team.