Seconding Lisa's response, there's no way to transfer a whole return from ProSeries to TurboTax. If your return is relatively simple, though, you may be able to transfer your basic info into next year's TurboTax for Windows once that program is available. 

Whenever I install TurboTax on a computer that has ProSeries (or Lacerte) clients, the program automatically finds these files and asks if I want to start a tax return from them. This article also has instructions on starting a new return by transferring info, and what amounts typically get transferred.

- Rebecca