How do you add the license code to a Turbotax account when purchased from Costco, Amazon, Target, etc?

I have read the majority of support comments regarding the purchase of Turbotax through a vendor like Costco, Amazon, Target, BestBuy, etc.   All I want to do is add my Turbotax download license number that I received from an outside vendor to my account (Costco this year, but previous years were Target and Amazon and have had the same issue).  Here are the steps I take:

1.  From the "intuit turbo tax" support page, I scroll to the bottom and select TurboTax CD/download login

2.  The link goes to the TurboTax account "login" page (which should be noted is different from the "Intuit Account Manager" page, and has no link between the two that I can find)

3.  I select the "downloads" link which shows all my previous purchases.  

4.  Scrolling past all previous purchases, there is a little link at the bottom of the page (my opinion is that it should be more visible at the top of the page) that says "TurboTax products ordered on a CD won’t show as an available download in the above list. If you ordered a CD but want to access TurboTax as a download instead, enter your license code here – you’ll find your license code in the instructions that came with the CD."  

5.  I attempt to enter my license code, I get a messages that states, "Whoops, we hit a snag loading your data.  Please try again." 

 

Now, I realize that I purchased an online download, not a CD version, but what difference should it make if I want to have my purchase listed in my account?  

 

I attempted to resolve this through the support group.  The first person was telling me things like I needed to be looking at my account through Google, not Safari or any other browser.  He also said I couldn't use my brand new MAC with an M1 processor that I bought simply because my older Mac could not upgrade to the Catalina operating system that is required for 2021 Turbotax to work.  The second time I called hoping to get a more knowledgeable person, I was told that my license code was for a 2020 product, not 2021, which was utter nonsense since I already downloaded the product and knew it was the 2021 version.  In both cases, I was told to return the product to the vendor for a refund, and repurchase from Turbotax directly at almost double the price I paid.  In past years, the support rep manually added my code so it showed in my account.  This year I was told that their software no longer will allow them to do that.  

 

Can someone tell me if it is possible to show my TurboTax purchase from an authorized retailer in my account?  The reason this is important is so that I can go back in future years to re-download the product in the event an amendment is necessary.

 

Unrelated to my question is that I find it interesting that there is so much chatter in the support groups about how Turbotax works differently between the online and downloaded versions, not allowing imports and such, and how purchasing from an authorized vendor versus Turbotax direct, whether by CD, download or online, can cause difficulties.  Bottom line is that the product should work seamlessly no matter how you purchase it from year to year, or what installation version you buy.