Hello h-chaggar-gmail-,
It's a pleasure to see you in Community. Welcome! QuickBooks Online let's you manage users, and their permissions, effortlessly. I would be glad to help!
Here's how to remove a time tracking user:
1. Sign into QuickBooks as the Primary Admin
2. Open your Settings ⚙ and select Manage users
3. Click on the ellipsis icon on the user you want to delete, then hit Delete
4. Select Delete user from the pop-up window to confirm.
If you have any other questions, feel free to reach out again. We would be happy to assist!