Can I save what i have entered so far and finish after?

Yes, 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

 For example, if you enter your W-2 following these steps:

1. Sign in and continue your return
2. Select the magnifying glass and search for W-2
3. Select the Jump to link
4. Select Work on my W-2 and Continue
   • If you've already entered a W-2, select Add another W-2
5. Enter your Employer Identification Number (EIN) from Box b on your W-2
6. If your W-2 can be imported, you'll come to the Great news! We can automatically import your W-2 info screen. Answer the questions to complete your import.

And then need to take a break your data entries will be saved.