Yes, you are correct, in order to e-file your return, you will need to change your son's name back an resubmit your return.
To do so in TurboTax online:
- Log into your Turbo Tax Online account.
- Select "Take me to my return"
- Click "My Info" located on the left side of your screen
- Click "Edit" next to your Son's Name and make the correction
- Next, walk through the "File" process to resubmit your return
