If you check the Complete box in the Return Manager when you complete a return, ATX will remember that date and use it whenever that box is checked. This is true even if you uncheck the box, make some changes and save the return.
We often update our notes for death, divorce, marriage, births, address changes, phone numbers, email addresses, etc. during the year, after the return is done. So we have to uncheck the complete box to save our changes, but as long as we recheck the complete box, the original complete date will be correct.
It's rare that we have to reprint a return, but it comes in handy when we do.