Upload Previous Tax Year Data

I am using TurboTax Premium for the first time. Last year's taxes were done by an accountant. I have a digital copy of Federal and State Taxes. When I attempt to upload my 2023 Federal forms i receive the following error message: The selected file is NOT a previous year tax file or it is corrupted.

Well the file is certainly 2023 and should not be corrupt. What are the necessary parameters that TurboTax requires to upload data? Do i need to not use the .pdf file type? I need more clarity because if TurboTax can't even perform this tax I have serious questions about its capability?