1040-x for 2020 says at the top Do NOt File

Please clarify, 

Did you use TurboTax to amend your 2020 return? 

That should not yet be available. 

I am using the Desktop Turbo Tax Premier- not the online version.

Yes there is a form available that is the 1040-X,. But on the top of the form on the right side it says in red letters 

Do Not File.

I called today and the Rep. said that the final version would be coming out in mid-March. And that I can efile it.

As the rules changed in 2019. Is  that alll correct? Thanks

The 1040-X form will be available March 25th, 2021.  Please see the Help Article here for more instructions on how to file a 2020 Amended Return.