You can remove contacts / sub-accounts that were added under your account with Entity Data.
How-to Steps
1. Open a browser and connect https://secure.entitydata.com.au
2. Log in with your username and password (if you've forgotten your username or password you can retrieve it from the login screen)
3. Go to the "Home" tab and click "Update" button under Your Info on the upper left corner.
4. Go to the "Contacts/Sub-Accounts" tab
5. Select from the drop-down list of "Choose Contact" and click the Go.
6. Scroll down to the bottom and there should be a Delete Contact button.