According to this documentation I can specify tax with priceSpecification. And syntax must be for example something like this (delivery charge example):
"priceSpecification": [
{
"@type": "DeliveryChargeSpecification",
"price": "10.00",
"priceCurrency": "USD"
}
]
The only problem is that there is no documentation about which @type for the "tax" must be specified, like in this example with delivery charge DeliveryChargeSpecification.
I tried to find it there and on Schema.org with no success. Any suggestions how is possible to specify tax charge information with Gmail markup?
The vocabulary Schema.org provides three sub-types for the
PriceSpecificationtype:DeliveryChargeSpecificationPaymentChargeSpecificationUnitPriceSpecificationUnless one of these applies in your case, you should use the parent type,
PriceSpecification.(If it’s about a price that includes VAT, you can use the corresponding type and its
valueAddedTaxIncludedproperty, which Google seems to support for their email markup.)