I have the exact same circumstance happening to me. I also have a single home rental and have taken losses in prior years. This is the first time turbo tax has given me an "error" to fill in this exact box. It appears the answer given was to put in the same amount that is showing in the "regular tax" column into the "QBI" column, if it was indeed considered QBI (which is it). Why is TT doing this now?
