Standard IDocs for Inbound Sales Invoice

Question

Hi All,
Beginner in the forum.
I have a requirement to develop an IDoc interface for Sales Invoice. I am not sure about the Basic IDoc Type, Message Type and Inbound Function Module to be used.
I can see Basic Types INVOIC02/01 and Message Type INVOIC. And the Function Modules IDOC_INPUT_INVOIC_FI and IDOC_INPUT_INVOIC_MM assigned in WE57. As my requirement is in SD perspective, I am little confused which one to use.
Any pointer would be helpful.
Thanks in Advance,
Khanshi

Answer 1

Sales invoices are generated referencing existing orders and deliveries through VF01 or VF04. Most if not all data for creating the invoice comes from the existing order/delivery documents (except may be freight costs etc which are know only during invoice time). So there is no standard IDoc (as most data for creating sales invoice is already there in SAP in the form of reference delivery/order) to create a Sales invoices. Sales invoices created through VF01/VF04 are outbound and can trigger INVOIC message type IDoc through IDOC_OUTPUT_INVOIC which is sent from SAP to the customer for billing purposes.
The IDOC_INPUT_INVOIC_FI and IDOC_INPUT_INVOIC_MM are for creating inbound vendor FI invoice (like that created by FB60) and MM vendor invoice (like that created by MIRO) respectively.
If you want to create a sales invoice through BAPI the below modules are available but I am sure there isn't a standard IDoc function to post a inbound INVOIC IDoc to customer/sales invoice. These BAPIs will of course require you to input the reference document (delivery or order) to create the invoice.
BAPI_BILLINGDOC_CREATE
BAPI_BILLINGDOC_CREATEFROMDATA
BAPI_BILLINGDOC_CREATEMULTIPLE
Best regards,
Vishnu Tallapragada