I am new to iDocs in general and FI. We will be implementing a supplier hub which automate the validation and processing of inbound invoices. We will take delivery of validated invoices and process them into SAP. Most of the work is in our integration layer (BizTalk) creating an new exchange from the hub into SAP. In the end we'll have an INVOIC02 iDoc to process. I've been trying to use existing iDocs in our test environment and also using WE19 to process them trough in order to make the connection between iDoc segment/field and the "Sales Tax Code" field in MIR6 which I know needs a new TAX Code value.
I can reuse and manipulate the iDocs and they are posted but so far I am unable to see the connection between and idoc segment/field and MIR6 "Sales Tax Code". The iDocs i've been using contain segment E1EDK04 which seems like the right segment but no change to the segment appears in the posted invoice.
Is there another segment I should be looking for or other processing that sets Sales Tax Code?
Thanks in advance for any help.