This board is not official customer support and we don't know anything different than the published schedule.
Turbotax has a habit of releasing updates late in the stated day. (I have suggested that they should make the official day the day after, in that case, but they didn't take the suggestion.) So it may be available later tonight or tomorrow morning.
Scheduled for release sometime today....doesn't appear to be ready yet though.
I did see someone early this morning that mentioned they were able to access the 1040X but they were getting errors that wouldn't let them complete it....so it may have been available for a short period of time early this morning and they pulled it to fix the issues.
This board is not official customer support and we don't know anything different than the published schedule.
Turbotax has a habit of releasing updates late in the stated day. (I have suggested that they should make the official day the day after, in that case, but they didn't take the suggestion.) So it may be available later tonight or tomorrow morning.