t is mandatory to enter this field if the box "All VAT codes" is not checked.
This code can be accessed by right click or by tunnel. It is linked to the tax type specified in the screen (additional tax, provincial tax, etc.): for instance, if the provincial tax is selected, the tax rates associated with this type of tax will be specific to the provincial tax. The tax rule set up at tax code level must be identical to the one specified in this screen.