Condition MWST - How is KOMK-ALAND getting updated


I'm having a sales order item with a wrong shipping point. When the shipping point is corrected to another one with a different departure country, the MWST condition is actually not updated. Then I look into the price analysis and find that departure country is still the old one of that wrong shipping point.

Our MWST is using standard access sequence - departure country -> destination country. It seems departure country is now getting updated from the shipping point of Customer-material info record. Where is this logic configured and how can I change it to be picked from the shipping point of sales order item?

Any input would be highly appreciated