Which versions of Magento does TaxJar support?

Magento 1 is no longer supported. New Magento 1 account connections will no longer be supported, please use the Magento 2 integration. Learn more about this here

We support Magento CE 1.7+ (up to the latest 1.9.x) and Magento EE 1.12+ for both sales tax calculations and reporting. For more information, check out our Magento extension guide.