"I suspect that there is no way to fix this for the 2020 product because while TurboTax can change the code in the download product for future installs, it is not possible to change the code on a CD that is already on a store shelf."
Since it seems the problem lies in their internal accounting, not on the computer to which you're trying to download, they could fix it on their main servers.
And if that's not the case, every time I open up the program it tells me there are software updates I should download and install. So they could correct existing programs remotely via an update, just like every OS does when there's some bug.
