Arizona residents can file income tax online to take advantage of the convenience and speed afforded by online filing. Taxpayers go through an interactive process that makes it easy to enter information and make the best choices regarding tax codes and the individual’s status and circumstances. Just follow the clear, concise step-by-step instructions for seamless filing of federal and state returns. In for some reason the return is rejected, e-filing allows for swift notification and re-submission online with the corrections. With no upfront fees for filing, it only makes sense.