Click on the Gear icon in the upper right-hand side of the page and select ADVANCED SETTINGS.
Scroll down to the section marked "Tax Rates". Here you can create tax rates, and once they are created, you can assign them to your Activities (see: How do I assign a tax to an activity?)
To create a new tax rate, enter the name of the tax and the corresponding percentage. To add multiple taxes, select the "TAX RATE +" button.
When you are finished making changes, click the "Save" button to update your tax settings.
Keywords: change sales tax, update sales tax, edit taxes, add taxes, amusement tax, tax rates, state tax