Click the Configuration icon 
or select View > Program Configuration from the menu to display the Configuration window.
To properly account for taxes, define tax rates. After you define tax rates you can define tax plans. Tax plans are combinations of several tax rates. For example, you may charge state, county, city, and city surcharge taxes. Your room or lodging tax may consist of several tax rates, perhaps state, city, and city surcharge. Define the tax rates first, then create a tax plan for your lodging tax that is comprised of the appropriate individual tax rates.
RezOvation GT provides tax reports so you can track the amount of tax paid to each taxing entity.
If you will export data to QuickBooks, the tax rates you setup should match those in QuickBooks.
Click the Configuration icon or select View > Program Configuration from the menu to display the Configuration window.
Select Taxes display the Taxes window.
From here you can:
Add, edit, or delete a tax rate
Add, edit, or delete a tax plan (rates must be defined first)