TurboTax tax data files are not imported. The prior year tax data file is transferred to the current tax year when a New current year tax year is started.
TurboTax stores, by default, all saved tax data files and saved PDFs in the TurboTax folder within the Documents directory, unless the default location is changed by the user.
On my Windows based PC using the TurboTax desktop editions for the past six years on this particular PC, all my tax data files and PDFs are in the TurboTax folder for every tax year.
