The Arizona transaction privilege tax (TPT) is actually a tax on a vendor for the privilege of doing business in the state. The state use tax rate is the same as the state transaction privilege tax (TPT) rate (sometimes referred to as sales tax), currently at 5.6 percent.As of the 2023 tax year, Arizona has a flat income tax rate of 2.5 percent. ○ Sales Tax: Do not include Sales Tax in Unit Prices. Find Withholding Tax forms, resources and publications. Find out how much you'll pay in Arizona state income taxes given your annual income. Customize using your filing status, deductions, exemptions and more. Withholding tax forms now contain a 1D barcode. Please use Microsoft Edge browser to get the best results when downloading a form. But the state's average sales tax rate is among the highest in the country.