The department created exemption certificates to document non-taxable transactions. This establishes a basis for state and city tax deductions or exemptions.Certificate is to document and establish a basis for state and city tax deductions or exemptions. These vehicle license tax exemptions are available at the time of application for an Arizona title and registration. Arizona Department of Revenue Web site- Find Arizona tax forms. Sit down with a Tax Pro to complete and file your tax return. You will find below a summary of the different earning amounts that are subject to garnishment and garnishment exemption amounts.