When I go through those steps, I can get back to the 6475 Letter info I entered with my stimulus amount. But I have no way to test an amended return.
I'd hold off and wait for now to see if anyone else sees this thread and comments. A lot of folks are posting in the forum during the day, including some TurboTax employees.
Or you can contact TurboTax Support during business hours. However, if you are using a Free Edition, you may not have phone support. In that circumstance you can contact a TurboTax agent by messaging at Twitter or Facebook.
Support hours are 5AM-9PM Pacific (8AM-12 Midnight Eastern), 7 days/week
FAQ: What is the TurboTax phone number?
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
https://twitter.com/TeamTurboTax
or
https://www.facebook.com/turbotax
