Hi,
I need to import free text invoices from a .csv file and include fields like Invoice Address, Delivery Address, Contact, Original Invoice Number and Reason Code.


However, these fields are not available in standard FreeTextInvoiceEntity. Also, I'm not clear how I can include them in the entity because some of them are edit methods, while addresses framework can get quiet challenging.
I'm wondering why the addresses fields are not included in out of the box FreeTextInvoiceEntity, like SalesOrderHeaderV2Entity and PurPurchaseOrderHeaderV2Entity? Does addresses in free text work differently than SO and PO? How can I resolve this?
Meanwhile the Original Invoice Number and Reason code, how can I properly extend the FreeTextInvoiceEntity so that these fields are importable?
Thank you.