You do have another option, if you happen to be a Mac user and are using Time Machine for your backups. From the Time Machine menu at the top right of your screen (which looks like a clock with a circle with left-facing arrows around it) open the menu item "Browse Time Machine Backups". Go to the previous day or an earlier time during the day, and look to see if your tax file was already archived. If it was, select it and choose "Restore". Time Machine will re-write your tax file back onto your current hard drive. This saved my bacon after I unintentionally went down the path of amending my state return, then canceled. Turbotax had already overwritten my file, making my Federal return information disappear.