Use the Change Cost-Based Invoices task to change cost-based invoices that have been generated in the Generate Cost-Based Invoices task.
You can change the status using Change Cost-Based Invoices. Select Tasks, Change Cost-Based Invoices. Select the invoice you want to change. To change the status, highlight the invoice and tab to the Status column. Then, click the arrow on the right to select the new status. When you are finished, click Close to return to the main Billing window.