I completed and paid and printed my 2018 taxes for mailing. I now need to update something and it's only giving me option to amend. How do I just fix and reprint?

[DoninGA]

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.