This answer assumes the 2023 return was prepared in Online TurboTax. In order to get to your 2023 return PDF you'll have to proceed further and act like you intend to buy a 2024 online product, but you don't actually have to prepare and buy the 2024 return. But that's the only way to get far enough to get the PDF. See the following steps:
If you have not yet started a 2024 online return:
Sign in to your account. What you see next depends on whether or not you have already started a 2024 return in that account. If your left column menu is minimal, and does not have a Tax Home tab displayed, that would imply you have not started preparing a 2024 return in that account. If you haven't yet started a return, it will start asking you some questions. Answer those preliminary questions, and you may have to choose a product, but you don't actually have to prepare a return. And then after a few screens when you are far enough into the process, the left menu column will change, and you'll then see a Tax Home option. Do not click the Documents tab. Instead, click on Tax Home. Then on the Tax Home screen, scroll way down to the bottom to "Your Tax Returns & Documents". Expand that section and choose the past year you want. If after all that your past returns are not shown there, then you likely have multiple accounts and signed into the wrong one. If that's the case we can tell you how to troubleshoot to look for multiple accounts.
