2024 is the current tax year in Online TurboTax. So if you used Online TurboTax, and if you are signing into the correct account, it should open at the Tax Home when you log in. If there's no evidence that you prepared a 2024 return in that account, and it's acting like it wants you to start one, we can tell you how to look for multiple accounts.
What are you trying to do by "access?" Do you need to download a PDF of a finished 2024 return? Or do you need to finish a 2024 return you started? Or what? We can tell you more once we understand your issue.