Nearly every type of good or service purchased is taxable when purchased in the normal course of business and is not explicitly excluded under the legal definition of "Steuerbefreite Umsätze".
*Basically, even when goods or services are taken and used for personal use, the tax paid out is not decreased since they could end up outside of the tax jurisdiction and that would violate the principle of destination "Bestimmungslandprinzip".
Tax paid on goods received outside of the EU is called Einfuhrumsatzsteuer (EUSt) or import duties and tax. A closer look requires a look at the EU-Binnenmarkregelung.