Hi Philip,
Thanks for the quick reply.
I have been playing around again but still can not get it to work the way I want.
I tried playing around with the rules, but i'm clueless/
What still happens is that when you are from NL, the taxes are added like it should be. But as soon you are from let's say belgium, taxes are removed no matter if you fill in a VAT number or not. It should just remove the VAT when a valid VAT number is added.
The VAT number check works, when I fill in a random number it gives an error, when I fill in a good number it's fine, so that works.
I attached some screenshots of all tax settings the way I have them right now, hope that helps.