I'm struggeling with this for a few days now.
I'm trying to sell products and insurances. Products have 19% VAT, insurances have 19% insurance tax.
I added a new Tax class, rate and rule.
If I see this correct, magento aggregates taxes with the same rate. There is no way to prevent this (at least I didn't found one)
It doesn't matter what priority my rules has.
I'm ending with this, which is correct calculated, but not splitted in the correct parts:
MwSt. (19%) 21,70 $ Vst. (19%) 21,70 $ Tax 21,70 $
After adding shipping, it looks like this, now the sums are totally screwed:
MwSt. (19%) 22,50 $ Vst. (19%) 21,70 $ Tax 22,50 $
The interessting part is, the invoice in the backend is again ok (the pdf too):
Shipping & Handling Tax 0,80 $ MwSt. (19%) 15,97 $ Vst. (19%) 5,73 $ Total Tax 22,50 $
At the moment I think magento can't handle two different taxes with the same percent rate. At first glance, this use case isn't needed, but this evaluation is wrong :-/
Any ideas on this?