@akvicki "Can I still go back and complete the 2023's?"
Probably not.
QB only stores certain forms such as the W-2 and 941 reports for the most recent year. Once you have the update containing the new forms installed, that's generally it.
That said, if you can find a local techie who is familiar with QB, or if you regularly create Restore points on your computer, you may be able to effectively rollback the update containing the 2024 W-2.
Of course, in the case of the Restore points, you'd be rolling back everything else since then as well, so take that with a grain of salt.