You cannot use Online TurboTax to prepare a 2023 return. If using TurboTax, you would need to purchase 2023 desktop software. The 2023 return cannot be efiled with TurboTax. It will have to be printed, signed, dated, and postal mailed.
Here's where you can purchase 2023 desktop software directly from TurboTax:
https://turbotax.intuit.com/personal-taxes/past-years-products/
