**Sales tax** – Calculates sales tax for a single line item based on market, shipping address, and base price. [New in 13.0.0.]
**Sales tax** – Calculates sales tax for line items based on market, shipping address and currency. [New in 13.0.0]

## Change the default calculation
By inheriting from the default implementation of the interface, DefaultTaxCalculator, you can override the calculation of get tax value and get tax category name. Just override one or several methods in the DefaultTaxCalculator.

**Related blog post** – [Adjust your Tax Calculation to Use Billing Address in Optimizely Commerce](🔗) by Casper Rasmussen.