That is most unfortunate! They should have advised you to copy the client data file to another name or make a backup of your data file folder as a backup in case anything went wrong and it obviously did. Do you have an external backup service possibly? We have a cloud service backup of the data files. I can restore the clients data file using the cloud backup should anything happen on our server but only if I do it within a certain timeframe. If not, I hope you can go to the data file and see the dates on the files, then delete the file showing the date of the second restoration. I have not had this happen so I am making a suggestion only. There may be a simpler way to discover original versus duplicate. If not, another call to Tech Support is in order because that is what I call a major problem if some data is missing from already filed returns.