This looks like the default PowerStore state tax rule. It works by looking at the state or province that the user has entered and compares this to the value you have in your global settings. If the user selects this state or province it should apply the tax to the order based on the rate that you have entered in the global settings. There is no updating that is required to make use of this tax rule. Only if you are adding in a custom rule or modifying an existing rule would you need to use eCart to make the changes.
