Looking forward to that, djmonkey!
I've got the same problem, for The Netherlands, with a 6% and a 19% TAX class, all for The Netherlands, so without using zones... I upgraded from 1.61 to 2.4.1, and it's getting better now (not 2 times the 19% calculation, but 2 x 19% and 2 x 6%)....
Just wanted to let you know I'm glad someone is working on this problem, I am dealing with it for quite a long time
:thumbsup: