Thank u Tejas,
I will explain my question with other way:
So the question is: when I have to display the Supplier VAT number for a document types that are not vendor documents (they has no BSEG-KOART = K and no vendorID), and when I have not.
In the tables BSET-STCEG, BSEG-STCEG en LFA1-STCEG, I find always the supplier vat number, but assume (and that happens a lot) that in the tables BSET, BSEG and LFA1 no STCEG (supplier vat number) exist, what should I do in this situation?
1- Do not display the supplier vat number?
2- Even so display the supplier vat number from another table?