The Arizona Department of Revenue recommends that Arizona businesses renew their Transaction Privilege Tax before January 1, 2022 to avoid penalties. Businesses should update and verify their information annually. Taxpayers can most easily enroll on the website, AZTaxes.gov. If out of state businesses without a physical presence in Arizona cross the $100,000 threshold in sales, they must renew their TPT license as well. (Arizona Department of Revenue, Electronic returns must be received by October 29, 2021)