I have just gotten this same error on my son's return I just sent efile. Puzzled as he is not listed anymore on my 2020 tax return. He was listed on my 2019 as a dependent but not 2020. Now I did file them both practically at the same time. Do you think they were looking at my 2019 then for this error code and maybe I have to wait for my return to be accepted by the federal before I can send my son's?
