My efile was rejected, TurboTax says Ready to Mail. I didn't print or mail my taxes. How can I switch back to efile?

When you sign onto your online account and land on the Tax Home web page, scroll down and click on Add a state.  See screenshot

This will take you back to the 2018 online tax return.

1. Select File in the left-hand menu (expand your browser window if you don't see this, or go to the hamburger menu in the top left corner).
2. On the Just one more step screen, follow steps 1 and 2 if you haven't already.
3. Select the Start button to the right of Step 3.
4. On the Let's get ready to e-file screen, select I want to e-file.
5. Follow the instructions to e-file your return.