Practice in closing a Billing period
Before you can close the General Ledger period, you must close the Billing period.
When you close the Billing period, the records are not updated to the General Ledger such as invoices and returns are checked by the Billing application. If any update exist, a report is created in the Billing application to notify records that you must update.
You can also use the Billing application to check the input file for interface invoices.