You should always make backups. You should save both the pdf and .tax files to either a flash drive or burn a CD or DVD. You can backup to anywhere you want. Do you have a cloud backup service or something like Drop Box?
The tax data files end in .tax2016, .tax2017, .tax2018 etc.
Are you using Windows or Mac? For Windows,
What I would do is just copy the whole Turbo Tax folder that is under your Documents. That should be where the .tax files and pdf files are stored. Copy that folder to a flash drive or best yet is to burn it to a CD or DVD and then you will have a backup of them.
Aren't you regularly backing up your whole computer? That should also be backing up the tax files.
