After you file

In TurboTax during the review of a 2021 amended return, it says "New as of August 2020! You may be eligible to electronically file your amended return.  If you'd like to file electronically, click on the "File" tab above to proceed".

 

I click on the File tab, enter the info, hit the Transmit button, then get the same message as the original post that the date for signing has to be between 1/1/22 and 12/31/22 but I am filing the amended return in 2023.  

 

Why does TurboTax say "you may be eligible to electronically file your AMENDED return" but then engage the signature date issue?