I have a weird problem that I can't solve. I have a product with tier prices. And I have different customer groups.
For the first group, the product is 7.40
For the second group the product is 9.58
When I look at the frontend, the price for group 1: is 7.40 and for group 2: 11.59
The 21% VAT is added to group 2, and not to group 1.
I've checked all the configurations, but I can't find it.
Magento version is 2.3. I have spent two days to upgrade to 2.4.2 but that is impossible.