Billable Expense Report does not Display in the Billable Expense Subtab of the Invoice.

1. Navigate to Transactions > Employees > Enter Expense Reports > List.
2. On the Status column, check whether the status is Pending Accounting Approval or Pending Supervisor Approval. If the status is set to either of those two, the Expense Report is supposed to be routed to a supervisor then to an accounting approver for approval before it can be billed.

Note: Notwithstanding the absence of the Supervisor Approval, the Accounting Approval may override the process without waiting for the supervisor to approve hence; the Expense Report may already be billed.