How does TurboTax work?

Could you elaborate on the functionality and process behind TurboTax, a popular tax preparation software? Specifically, how does it assist users in preparing and filing their taxes? Does it provide guidance throughout the process? Does it offer features such as tax calculators or auto-filling of forms? Additionally, does TurboTax ensure the accuracy of the tax returns it generates? How does it compare to other tax preparation software in terms of user-friendliness, cost, and overall effectiveness? Answers to these questions would help individuals understand the benefits and workings of TurboTax.