Open either the 
Posted Sales
Shipment window, the Posted Sales
Invoice window, or the Posted Sales Credit
Memo window.
When you post a sales invoice, a sales shipment or a sales credit memo, the information on the invoice header and lines is transferred to the Posted Sales Invoice, Posted Sales Shipment or Posted Sales Credit Memo windows.
Open either the Posted Sales
Shipment window, the Posted Sales
Invoice window, or the Posted Sales Credit
Memo window.
You cannot enter, change or delete anything in these windows (except for a few fields on the Shipping tab of a Posted Sales Shipment form).
You can print a shipment, invoice or credit memo from these windows.
To get an overview of the posted shipment, invoice or credit memo, click Shipment, Invoice or Credit Memo respectively, and then click Statistics.
After a period of time, you may have a large amount of outdated information in these windows. To save space in the database, you can delete printed invoices.
Deleting Invoiced Sales Orders
Deleting Invoiced Blanket Sales Orders