Over and above that, TurboTax users can always call the TurboTax phone number to clarify any doubts they may have before filing their tax returns. Since many users find it difficult to fill the tax forms, TurboTax has developed a series of questions through which the software will automatically calculate the tax requirement of the user. It has made it very easy to file your state and federal taxes well before the tax deadline and also has several features that allow you to maximize your tax refund. TurboTax is one of the most popular tax preparation software out in the market today.