In order to calculate fair prices for a service, (e.g. VoIP calling credit) bought via In App Purchases (IAP), you need to know the VAT rate that applies to the country where Apple ID is registered.
As far as I know, an app can only find the currency of the user's Apple ID, using IAP APIs.
Now, currency code is sufficient if used for only one country for App Store purchases; because then the VAT rate of that country simply applies. But in the euro zone for example, Apple applies the local/varying VAT rate for each country using the EUR.
Is there a way to get to the country code, from a receipt (on either app- or server-side) or iOS APIs?