OpenSalesTax for WooCommerce

OpenSalesTax for WooCommerce Replace TaxJar / Avalara / WooCommerce Tax with self-hosted OpenSalesTax. Free, open-source, US sales-tax calculation at WooCommerce checkout. Status: v0.4.1. Tested against WordPress 6.6+ / WooCommerce 10.7 / OpenSalesTax engine v0.39. 109 unit tests + an end-to-end integration test on a real WP+WooCom Proxmox VM. What this saves you Most WooCommerce tax plugins are paid services or limited free tiers: | Service | Pricing model | |---|---:| | WooCommerce Tax (Jetpack) | Free up to 200 transactions/mo; paid tier above | | TaxJar | from $19/mo + transaction fees | | Avalara AvaTax | enterprise pricing | | OpenSalesTax + this plugin | $0 software cost, self-hosted | You run a small VM (or container) for the OpenSalesTax engine; this plugin calls into it from WC's checkout flow. Tax math runs locally on infrastructure you own. Install Activate via WP Admin → Plugins. Or via Composer: The SDK (ejosterberg/opensalestax) and the plugin (ejosterberg/opensalestax-for-woocommerce) are both on Packagist. For the full step-by-step walkthrough including engine setup, configuration, and verification, see docs/INSTALL.md. Configure 1. Stand up an O