What do you mean by the "new online service"? TurboTax Online is the same as it's been for many years. If you used TurboTax Online in previous years you have to sign in with the same user ID in order to see your old tax returns.
In previous years did you use the CD/Download TurboTax software installed on your own computer, not TurboTax Online? If so, the old returns are saved on the computer that you used to prepare them. They are not in TurboTax Online and there is no way to "load" them into TurboTax Online.
If you want to use TurboTax Online for your 2023 tax return, and you want to transfer your information from the 2022 tax return that you filed with the CD/Download software on your computer, see the following FAQ for instructions.
How do I transfer last year's return into TurboTax Online?
