Combo

Combo represents the tax combination of a category code and rate key.

Schema ID

https://gobl.org/draft-0/tax/set#/$defs/Combo

Properties

Title	Property	Type	Description
Category	cat	cbc.Code	Tax category code from those available inside a region.
Country	country	l10n.TaxCountryCode	Country code override when issuing with taxes applied from different countries.
	key	cbc.Key	Key helps determine the tax situation within the category.
Rate	rate	cbc.Key	Rate within a category and for a given key to apply.
Percent	percent	num.Percentage	Percent defines the percentage set manually or determined from the key. A nil percent implies that this tax combo is either exempt or not-subject.
Surcharge	surcharge	num.Percentage	Some countries require an additional surcharge (may be determined if key present).
Extensions	ext	tax.Extensions	Local codes that apply for a given rate or percentage that need to be identified and validated.

Validation Rules

Field	Test	Validation Code / Message
Combo	Category in regime	GOBL-TAX-COMBO-01 Tax category not valid for regime
Combo	Key in category	GOBL-TAX-COMBO-02 Tax combo key not valid for category in regime
Combo	Rate in key	GOBL-TAX-COMBO-03 Tax combo rate not valid for key in regime
Combo	Percent valid for key	GOBL-TAX-COMBO-04 Tax combo percent required or invalid for key in regime
Combo	Surcharge requires percent	GOBL-TAX-COMBO-05 Tax combo surcharge requires percent in regime
Combo	Extension keys defined	GOBL-TAX-COMBO-06 Tax combo extension key not defined in regime