RESOLVED: Error message when reinstalling CD product on second computer from download location

This was accidentally posted twice. See other post:
RESOLVED AFTER MANY CALLS: Cannot reinstall/download CD product on second computer 

@https://ttlc.intuit.com/community/taxes/discussion/re-cannot-reinstall-download-cd-product-on-second-computer/01/178941

Hello, I bought a TurboTax Deluxe CD 2020 version on Amazon and installed the CD product 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 gives an error message: "This license code has already been associated with an account. Please check that account and look for it in Downloads."

This license code, however, doesn't show 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 googled extensively online and searched this forum but there are no 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  -- BAD user experience all round by TurboTax!

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!