I saw this, thought "wow this is great, I sure miss living in the US where good tools like this are available, everything in Europe is crap" but lo and behold, there's the Netherlands tax preset. Fantastic.
I think there may be a few wrinkles in the nl tax code that are tricky to capture with the current framework, but it has been a goal from the beginning to be as inclusive as possible for international scenario modeling. I'm continually making refinements there, and always open to ideas and suggestions if you have some.