In the Netherlands the tax rates varies on what you send.
How can I achieve this?
I know there are other countries with similar regulations, but I can't find any solution.
I don't have experience here but an older post on stackexchange about this (https://magento.stackexchange.com/questions/44202/vat-over-shipping-costs-depending-on-vat-rate-of-p...), suggests that the FireGento_MageSetup extension might help.
It's the same thing in Sweden - By law the shipping tax should have the same tax rate as the product that you are selling. If a customer buys two products with two different tax rates then it's the highest tax rate that should be valid as a tax rate for shipping.
In Sweden there's 6% tax for books, 12% tax for food products and 25% for all other products and services. So if there's a BBQ shop like ours that sell grills (25% tax) but also BBQ rubs and BBQ sauces (12% tax) then it's impossible to have the correct tax rate for shipping that the law requires.