I know is very frustrating.  These were the errors I got originally before I updated payroll.  I was able to upload one client successfully after updating the payroll service within QB. 

FYI:  Error R100005 requires that this line should be the last line in the text file -- RF [removed] where the number 6 indicates the number of W2s.  If there are 200 W2s, then it would be RF [removed]

However, I am running into another error:  when I tried to create and upload another client, I am getting a different error message saying "incorrect extension" even though the extension used is the same as the successful one (.TXT).   Now I need to figure out how to resolve this one.  Very frustrating.