Applying the correct VAT to Shipment when 2 VAT rules

[alatak]

Hello

I have a shop that sells products that has 2 different VAT rates.
- most of the products have a rate of 20%
- one product has a rate of 7%


The 2 VAT rules have countries (EU countries), and category conditions:
- rule 20%: countries= EU countries, and category=7%
- rule 7%: countries= EU countries, and category=20%

All the products have "apply default rule": and  this works fine.

For the shipment:

CASE 1: is OK
In the cart you have
- only products with rate 20%

if the VAT rule is Apply default rule:
- in this case the VAT applied to the shipment is 20% if the destination country is of the EU country, and 0% if the destination country is outside EU.
Everything is ok.


CASE 2: is not OK
if in the cart you have
- one product with rate 7%
- one product with rate 20%

if the VAT rule is
- Apply default rule: in this case the VAT applied to the shipment are 7% and 20%: which is wrong
- 20%: in this case the VAT is always 20%, no matters the destination country. It means that if the goods are sent outside EU, the VAT is applied: which is wrong too

How do you solve this issue?