How do you update Magento sales tax rates?
In order to import sales tax rates into Magento, make sure you have the latest version of our Magento extension installed.
You can verify the extension is installed by going to System > Configuration and looking for "Sales Tax Automation" at the top of the configuration menu.
To check for updates, you can use the Magento Connect Manager at System > Magento Connect > Magento Connect Manager.
Our extension will automatically update your sales tax rates on the first of each month. If you would like to update your rates manually, go to the "Sales Tax Automation" extension page under System > Configuration. Simply click the "Save Config" button and wait a couple minutes to update your rates.