This option is only available to Admin and Editor Users.
If your client has an open balance in Invoiced.com, it will be displayed on the left side of the Record View. If the account is in arrears, there will be an indicator in red. If the account is current or the invoice is not due, the balance will be shown normally.
If you find that Invoiced.com is not the right tool for you or your practice, you can always disconnect your Lawlab instance from Invoiced.com by clicking on Manage Invoicing in Settings and selecting Disconnect option: