Did you use the TurboTax desktop CD/Download editions in the prior tax years? If so, then it sounds as if you are using the TurboTax online web-based editions instead of the desktop editions if you are being asked for a User ID and Password.
Go to this TurboTax website to purchase a CD or Download of the 2019 software - https://turbotax.intuit.com/personal-taxes/cd-download/
