Distribution Channel VTWEG text information is inTVTWT, Organizational Unit: Distribution Channels: Texts table in fieldVTEXT. Here is a small ABAP code part of a larger ABAP program where I read the text of VTWEG - distribution channel for the login language fromTVTWTSAP table. VTEXTfield ...
3) check billing document field (BSEG-VBELN). When you find the billing document number (VBELN), you'll find the corresponding VKORG, etc. in table VBRK. RFPOS is a structure that might be used for both customers and vendors, so I think that KONTO = KUNNR when you are looking ...