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