I contacted TurboTax support, and they advised me to download the PDT file from the online version, save it with a .tt24 extension, and then import it into the desktop version — or possibly do it the other way around. Unfortunately, none of these steps are working. It feels like the customer support agents are just guessing without actually understanding the process. They also told me that activating the code on the desktop version would automatically activate the online version, which is completely incorrect.
