Can I save what I have done so far. If so, how do I save my information?

[DoninGA]

Click on Sign Out at the bottom left of the program screen.  The tax data entered is automatically saved as it is entered.

[StacyK]

TurboTax Online automatically saves your work as you progress through the tax interview. When you sign out your progress will be saved and you can sign back in and file your return at a later time. To sign out, simply click Sign Out at the bottom left of your screen.