KenGreenberg - I really appreciate your original comment - as I'm having the VERY same issue.  I've tried renaming the CLIENT, the TAX RETURN... nothing.  QB/ProConnect definitely has A LOT of work to do in this arena.  QB Team, yes, please - create a link between QBO and ProConnect that let's tax prepares direct the information for Single-Member LLC's or Sole Prop into a Schedule C.

Thanks to Greenberg's helpful hints, I'm going to try to import a QBO file.  I haven't tried yet, but as jvorn stated above, the only import option I see is for Schedule D & Depreciation.  I'm goin to watch some video to try to figure it out.