There are a number of different versions, including TurboTax Deluxe, TurboTax Premier, etc. TurboTax is available for both federal and state income tax returns. The software is designed to guide users through their tax returns step-by-step.The TurboTax software provides taxpayers additional support for their self-prepared returns by offering Audit Defense from TaxResources, Inc.or filers who use this basic version of the software, federal filing is free. However, state tax filing is not free, and the cost of using TurboTax to file state returns is not presented to the user until they've already completed entering their information for federal returns.