“Yes, if I kept PDF's or hard-copies of each return I could compare.  Hard-copies would require another room and PDF's are another step in the return preparation that until now, I have never needed.”

I used to think that way and then discovered it is MUCH faster to print a pdf and then print a paper copy from the pdf, rather than use the PS print-to-printer routine. 

i print pdf of the returns, invoice, etc… and drop them into my client folder. about 1/3 of my clients get PDF returns through intuit link so it’s just a drag and drop instead of paper…. For those that get paper, i usually have a high school kid print, put the returns together, and call, mail, or (occasionally) deliver.  

The other benefit is that I always have a copy of the return AS FILED and don’t have to worry about Intuit sneaking up and changing the returns.