RESOLVED AFTER MANY CALLS: Cannot reinstall/download CD product on second computer

(This is edited for clarity so it can help other users, thanks. I was finally able to download both Windows and Mac versions.)

Hello, I bought a TurboTax Deluxe 2020 CD on Amazon last week and installed it on my Windows desktop computer via a CD drive using the license code on the CD jacket. At the time, it did NOT ask me to create an account nor ask me to sign in to my existing account.

Now, I'm trying to download the software to my laptop (which doesn't have a CD drive) -- via the InstallTurboTax website. When I input my license code, it says: "This license code has already been associated with an account. Please check that account and look for it in Downloads."

However, this license code isn't showing up in my account -- likely because I wasn't asked to sign in to my account when installing the CD on my desktop.

I've researched this problem online and searched this forum haven't found viable solutions. TT only points to the process I've already tried out above without success -- it generates the same error message about license code associated with another account.

I tried to put in a help desk ticket on the TurboTax website, but it allows only 2-3 lines -- so wasn't able to explain my situation!

Maybe I shouldn't have installed the CD on my desktop via the CD drive, which didn't give a prompt to sign into my account.

How can I remedy this situation, short of uninstalling from my desktop? Not sure if that would help.

Any advice is deeply appreciated. Thanks, in advance!! Happy and healthy new year!