We should be able to edit certain fields in invoices !
The biggest problem we get is shipment dates being changed a lot which dictates that the
due dates need adjustment.
We convert the SO to an invoice on production of the SO to accept a payment against the invoice as a lot of customers are required to make an up front payment to order items !
- This Invoice is in the open status hence, the amount or date related fields cannot be edited.
Reminders are often sent out though the goods haven't been shipped - really embarrassing !!
I know this can be changed in preferences but we don't want the ability to allow any major changes !