Solidus comes with a tax calculator that is used to calculate both sales tax
(United States-style taxes) and value-added tax (VAT):
Spree::Calculator::DefaultTax. Typically, this
calculator should be the only tax calculator required by your store.
Using this calculator, all tax rates are represented as a decimal. So, a tax
rate of 5% should be represented as 0.05.
Taxes can apply to line items, shipments, or an entire order.
The tax calculator uses its calculable – a Spree::TaxRate – to calculate tax
totals.
For more comprehensive documentation about taxes in Solidus, see the Taxation documentation.
If your store's tax requirements are more complicated, you may want to create a
custom tax calculator or use an extension like
solidus_tax_cloud.