A solution! Again, my issue was that a zero entry on a line item was being treated by Turbo Tax as a dollar amount. The zero could not be removed. It was being entered from unpopulated underlying Turbo Tax mini worksheets. After speaking with a Turbo Tax agent on the phone we were able to right click the line with the zero entry. This displays a menu including an "Overwrite "option. The zero could then be deleted leaving the line blank. An error was then no longer reported in Error Check and I could e-file.
This may have been caused by the unusual situation in TTax that you cannot have an amount on one line if you have an amount on another line. That was logically correct in this case but TTax was treating zero as an amount.
