Vendor has configured some non-zero tax and assigned it to a service plan category.
The prices in CCPv2 Marketplace tiles are shown without taxes included though the orders are created with correct amounts. Or vise versa, the provider wants to show NET-prices in CCP v2, without the taxes, however the prices with taxes are shown in the control panel. How to configure CCP v2 behaviour?
The Display Rule option defines the way price and taxes are calculated and displayed in CCP. "Always calculate and display prices with tax" shows the price with the tax included.
This parameter and the other ones of Customer CP tab are described in section "Configuring Customer CP Settings" of the documentation.