You can copy the .ttxx files from your old computer onto a portable drive or online cloud storage and then copy them to your new computer. By default TurboTax CD/Download files are saved in a "TurboTax" folder within your Documents folder. ex: C:\Users\yourusername\Documents\TurboTax
Once you have copied the files over, you can delete the files on your computer just like any other files. If you are going to sell or donate your old computer, you may want to use a secure delete program to make sure your files are completely wiped.
