I am so sorry that this happened to you. It is a hard lesson to learn. Before you start any amend in TurboTax you must make a backup copy of the original taxfile. The amend wipes out the original and there is no way to get it back. I wish TurboTax would build a warning into the program or modify the program so that it creates a backup before amending.
In your case at least you did have a pdf copy and could use that to recreate the original and then save that and amend it. But once again I am sorry that this happened to you.
