How do I switch from filing my takes through mail to electronically if I've already done that?

[DoninGA]

If you have already printed and mailed your tax return it cannot be e-filed.

See this for how to change from mail to e-file if you have not mailed your return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/change-mail-e-file-turbotax-o...

[JohnB5677]

If you haven't mailed your taxes, and want to efile, but you can't get back into your file to make a change:

• Sign in to TurboTax
• Select 
  • Tax Home or Add a State 
  • (even if not needed)
  • This will open the return.
• Go to the File section.
• Look for a button that says 
  • I want to e-file or 
  • Change filing method
• Follow the interview to switch to electronic filing
• Then submit the return