so, i had a question asked in an interview. they wanted to know what the sap process was for tax determination. the question went something like this, you're in country A and the customer is country B and places an order, how does SAP know what the tax should be? he gave a hint that it has to do with Plant. he said we don't specify the country in the master data, so what is the process that SAP uses. and again, he said Plant is the big hint. any suggestions?