@erluke You'll need to transfer your .tax data file for 2018 to your new computer. Since you already have TurboTax 2019 downloaded and installed to your new device, the instructions I'm linking below should help yo out. Please post back if you continue to have difficulty.
How do I move my tax data file to another computer?
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*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
