Move your mother's tax return Turbo Tax file out of the folder it is in. Make sure yours is in there. Put your mother's file into a folder with an obscure name- if it still comes up, change the extension on the file BUT make sure you know exactly what it was changed from as you will need to put it back the way it was when you need to do her return. If you did these with the online version, no may not have a copy on your computer and if you have to rely on their cloud storage you may not be able to recover your tax return without help from Turbo Tax.