Non Regime tax

Hi

We have a requirement wherein business will also do transactions in regimes apart from the main regime being setup.

E.g. Business is operating in Germany so lets say we will have Germany Tax Regime. However, the business may have some transactions in other european countries as per the tax rates applicable for that particular country.

How to cater such requirement. Do we have to define separate tax regimes for the same or tax codes for lets say Austria can also be defined under German Tax regime?

Thanks