After you file

@budapest100 If you go back to your 2018 tax return, is there a Cancel amend link on the left side of the screen?  If so, then click on that link and then select  Yes, I want to cancel my amended return and Continue.

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.