The behavior is flaky.
Sometimes when clicking Add a state it will jump to the amend page, and showing amend is not available yet.
Then I tried more times, sometimes it shows my current state in a list, which I can edit it, then it will open the state tax, but the sidebar won't show federal tax menus.
Then I somehow was able to open the federal tax and noticed if i change the url from
it will work.
Then this morning I tried add state again it will open both state and federal return.
It seems the key is the URL.
