Hi Mike, thanks for your help.
I found out that a totaly different plugin was messing around the whole tax system.
Sorry for bothering you, everaything works fine now.
Hey Mike,
thanks for your anwer. Based on what you said, I was rebuilding the webshop, and used shipping zones instead.
The problem is stil lthe same.
Now I have a taxable flat rate for 13,99 taxable.
And it calcutes the same 13,99 is total 13,07 net worth. Which would be incorrect.
Items tax rate is also applied to shipping.
Do you have any thoughts on that?