I'm using BAPI_ACC_DOCUMENT_POST to post an FI document with two line items: GL ACCOUNT line item and TAX line item.
The document is correctly posted and I can see the line items in BSEG and BSET tables.
The problem is that I need to update some BSEG values for the TAX line item but the ACCOUNTTAX in the BAPI doesn't have those fields: ALLOC_NBR (ZUONR) for example.
My question is How can I populate BSEG-ZUONR for example for a TAX line item (ACCOUNTAX BAPI parameter) using BAPI_ACC_DOCUMENT_POST ?