no way to solve the problem until we know who is doing wrong. Only way is, to delete multi/combi rabatt.
Wont be possible for us, cause we sell lots of small products that belong together. Otherwise the costumer
pay shipping costs for each produkt they buy. Here is what M2E told us:
I've consulted our developers regarding this issue. If eBay API does not provide VAT amount for the combined orders, there is no way from our side to get such data. M2E Pro cannot influence eBay API configurations and trigger the value of tax applied for product price to be returned
For now, as a solution, you can continue using "eBay" as Tax Source (the workaround that was suggested previously).
Or, as a possible option, you can configure Magento Tax settings for combined orders in the way you need, and set Tax Source as ''eBay and Magento'' in the account settings.
Theres no way for us, to use Magento settings.