If you used the TurboTax desktop editions for 2017 to complete and file the 2017 tax return then the 2017 tax data file will already be on the computer where you installed the 2017 TurboTax software. The 2017 tax data file has a file extension of .tax2017 and by default is stored in the Documents directory and in the TurboTax folder.
If you cannot find the 2017 tax data file then start the 2017 TurboTax program. Continue the tax return and then click on the File menu at the top left of the program screen. Click on Save. The tax data for 2017 is now saved on the computer hard drive in the TurboTax folder.
