To be clear - You started the 2023 TurboTax program. You started a new 2023 tax return and transferred the 2022 tax data to the 2023 return. After transferring the 2022 tax data to the 2023 return, did you actually enter any tax data or personal information in the 2023 return? If you did then did you click on File at the top left of the desktop program screen and click on Save? If so, and this failed, have you tried using the Save as... link and name the file to see if that will save?
