Could someone help me decide whether TXS020 is less helpful than it could be or that I'm missing something?

I'm trying to setup some very basic VAT exceptions like: If an order line/delivery ships from Belgium and delivers to Germany, do X. If an order line/delivery ships from Belgium to Belgium, do Y. I have tried both Base Country and From/To Country in combo and separately, but they seem to both register as the country of the departure warehouse only (or maybe even the country  Read more...of the main warehouse of the facility??).

Am I using these in the wrong way? Is there a simpler configuration to use? Thank you Show less...