Can I start over because information is wrong?

Yes, you can create a new return on your TurboTax online and delete the existing one.  

To start a new return:

• Sign in to your TurboTax online.
• On your page "Great to see you again", you would see start a new return. Click on it, and it will lead you to the main page where you have to choose the Product to start your return.
• Once selected, you are able to start your brand new return. 

To delete your previous tax return:

• Once you have started your new return, later if you wish to delete your previous return, you can click on View all tax returns on the left panel under MY RETURNS. 
• You would see, that other returns would have a delete sign (Trash Can) beside it. You can click the icon, it would delete your tax return.

Thank you for choosing TurboTax.