I "filed" by printing my return, but never sent copy to IRS. I have changes and then want to e-file. It's not an amended return b/c it was never filed. Can I do that ?

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 where you can make any changes before filing the tax return.

Thank you !