Advanced configuration
The Advanced Configuration section of the Commerce settings contains a number of tools and settings typically used in marginal or advanced cases.
Prices
Set the system VAT rate and tweak VAT behaviour for e.g. fees
Shopping Cart
Tweak the behaviour of the Shopping Cart app in various ways
Order discounts
Configure discount behaviour related to how discounts stack, when they are applied relative to taxes, etc.
Loyalty points
Override the default loyalty points expiration period and more
Gift cards
Override the default gift card expiration period, activate VAT for gift cards
Auto-numbering
Change how the system creates auto-IDs for various objects like orders, validation groups, etc.