More importantly, if you keep the prior year program and files, you can save time and effort by importing your basic personal data from, e.g., your TT2017 file on your computer into the new TT2018 file. You don't have to, but it helps a lot if you stick with TurboTax year after year. And there's no issue of security compromise, as the data is going from one spot on your computer to another.
