In the FILE tab ... before you file ... you are given the option to review your return ... at that point you can save a PDF of the return in 3 different ways. What you do with the PDF returns and who you show them to is up to you.
Using Turbotax online, you can't access a PDF or your tax data file until you pay for the program. Paying is normally the last step before filing, but you can pay and then go back to work on your return without filing yet.
Then you can download or print your tax return, or "all forms and worksheets" which includes the tax return and most of Turbotax's internal calculations. Or you can download the tax data file, although the only way to open it is on a computer that has turbotax installed directly on the computer.
To pay without filing:
Payment instructions: