Field help (GENTVA) 

VAT code

This term describes the VAT category to which the product is subject. Ex: Reduced rate, increased rate, etc.

VAT rate

This is the actual rate applied to a product during a sale or a purchase. Ex: 20,6% , 5,5% , ...

VAT rule

This term describes the table that is used to determine the VAT rate depending on the VAT code. The rule is generally determined by the customer or the supplier. Ex: National, Export, ...