About the Wix eCommerce Tax Calculation Provider Service Plugin

As a tax calculation provider, you can integrate with Wix to allow merchants to request and use your services on their Wix sites. The tax calculated is then included on the site's cart and checkout pages. Use the Tax Calculation Provider service plugin together with the Tax Groups API and the Tax Regions API to customize your tax calculations.

With the Tax Calculation Provider service plugin integrated into your app, Wix calls your app with Calculate Tax whenever tax needs to be recalculated on a site. For example, when line items are updated in a cart or checkout.

The integration is done via an app created in your Wix Studio workspace and by implementing the Tax Calculation Provider service plugin.

Use case

• Calculate tax for the United Kingdom

Terminology

• Tax Region: A location, defined by country and subdivision with a specific tax treatment. Tax is calculated based on the tax region and the tax group associated with a line item. See the Tax Regions API.
• Tax Group: A category of products that share the same tax treatment. Tax is calculated based on the tax group and the tax region associated with a line item. See the Tax Groups API.
• Tax Calculator: An app that is used under the hood to calculate tax for a Wix site. The app calculates tax based on the tax group of the product and the tax region of the sale. By integrating with the Tax Calculation service plugin, your app becomes a tax calculator.

See also

• About Service Plugin Extensions
• Add a Service Plugin Extension With the CLI
• Add a Self-hosted Service Plugin With the SDK
• Add Self-hosted Service Plugin Extensions with REST