Van Buren Drive) Tel: or. . How much does an Arizona state income tax return cost? For the most current information, including all the latest forms and publications, visit our Arizona State Income Tax Services section. What is the Arizona income tax refund system? For more information about the annual Arizona income tax refund, including how the taxpayer should claim his/her tax refund, visit: What about the Earned Income Tax Credit (ETC) in Arizona? The ETC is a federal program designed to support the working poor. The Arizona income tax system is designed to be very progressive as far as taxes and deductions are concerned. So, the ETC is available only to taxpayers above the Federal income tax filing threshold of 750 for singles and 900 for married couples filing jointly. Because of this, it is not a revenue raiser. However, there are tax credits available to those who are at or below the Federal filing threshold. There are some additional requirements you must qualify for and these must be met before you can get the ETC. For more detailed information, the Taxpayer Enforcement and Information Center at: (See for more information about the income tax program and the ETC program.) If you have any questions about these programs, please feel free to contact the Taxpayer Enforcement & Information Center at: . Where do you get your information for the Arizona income tax forms and publications? All the information in this section is based upon the information provided by each agency/office at the time of publication. There may be some errors or omissions in the information, so always double check with your tax agency before submitting a State, County, or City income tax form.