Comply with price indication regulation
If different tax rates are calculated for different EU countries, the price of a product can change during the ordering process if a different delivery country is selected.
An example: A product is sold for 200 euros incl. 19% (DE) VAT. This price is also displayed on the product page. If Austria is selected as the delivery country on the checkout page, for example, a tax rate of 20% will be applied. WooCommerce then changes the price in such a way that it deducts the tax of the shop base country from the set gross price (in this case the 19% (DE) VAT) and then adds 20% (AUT) taxes for Austria. This would result in a gross price of 200.91 euros (200 euros / 219 x 220).
The gross price would therefore change. Based on the Price Indication Ordinance , the price displayed in the shop system must be the total price including VAT, which must therefore no longer change during the ordering process .