How to config one with withholding tax code to posting mutiple WHT lines?

[naomy_xu]

Hello everyone,

I am working in an intergration project and call BAPI BAPI_ACC_DOCUMENT_POST to create FI document.

Here comes a question, that some withholding tax code(For example,WA) are not calculated/posted when I use the BAPI.But the tax base and tax amount is record in the withholding tax info.

So I copy the document and mannually post it in SAP, and then the WHT items show up.

I check BSEG table and see that, in the front-end user enter WHT code WA, but the finally document is posted with WHT code C1,W1,W7.

I have check the backend configuration but didn't go an info that can make this happen.Maybe anyone can teach me what kind of system behavior I am dealing with? Customer did't config any extemption or changeover.

Thanks a lot!

Naomy