Do you have any details as to a timeline when this will be available?  It should not be available as an option on the drop down unless actually available to utilize.  This is confusing to tax preparers and causes us to tell our clients "Yes, I can e-file it through ProSeries" and then have to go back to them later saying we were wrong.  It makes us look bad.

In case it is a problem they are having with the programming, this might be part of it (see screen shot).  The error refers to extensions when the box where the information is listed is regarding amendments.  Just in case you can pass that along to someone.