Currently, it's only possible to display EITHER net price (including VAT) OR gross price (excluding VAT) on the product details page. A combination of both prices is not possible for Dynamics 365 BC.
As a webstore administrator, we have to display both, the net price (excluding VAT) and the gross price (including VAT) on the product details page to keep using Google Shopping. This requirement affects several countries, including Germany, Austria, Switzerland, Netherlands, France etc.
Source: https://support.google.com/merchants/answer/6324371?hl=en&sjid=11099813395256483822-EU#zippy=%2Ctax-australia-argentina-austria-belgium-brazil-chile-colombia-czechia-denmark-france-germany-hong-kong-india-indonesia-ireland-israel-italy-japan-malaysia-mexico-new-zealand-netherlands-norway-the-philippines-poland-portugal-russia-saudi-arabia-singapore-south-africa-south-korea-spain-sweden-switzerland-taiwan-thailand-turkey-ukraine-united-arab-emirates-united-kingdom-vietnam