Thanks for your response.  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 guess I am foolish to expect that paying over $2,000 each year to Intuit would allow me to compare the EF accepted return with the return they updated without notice.  

I promise, I did look before posting my question.  All that I found was that I could lock the return before opening them.  I was hoping there was a solution that didn't require a time-machine.