Go back to your 2018 online tax return and e-file the tax return.
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.
- Select File in the left menu.
- On the Just one more step screen, follow steps 1 and 2 if you haven't already.
- Select the Start button to the right of Step 3.
- On the Let's get ready to e-file screen, select I want to e-file.
- Follow the instructions to e-file your return.
If you receive a message that the tax return cannot be e-filed then it will have to be printed and mailed.
See this TurboTax support FAQ for printing a tax return for mailing when using the online editions - https://ttlc.intuit.com/questions/1944348-how-do-i-print-and-mail-my-return-in-turbotax-online
