Then to get back into your return you should click on Add A State, not Amend. Not sure what you were told yesterday but you do not have to pick File and Mail to print your return.
Before filing, you can preview the 1040 or print the whole return
https://ttlc.intuit.com/community/accessing/help/how-do-i-preview-my-turbotax-online-return-before-f...
How to switch to efile
https://ttlc.intuit.com/community/e-file/help/how-do-i-change-from-mail-to-e-file-in-turbotax-online...
