From what I can tell, Transamerica does not offer what you're referring to as "auto download". They only offer Web Connect downloads, where you manually logon to the Transamerica web site and initiate the download.
If you do that, you should be able to link the downloaded Web Connect data (the QFX data) to your existing Quicken account.
woodsonc1461 said: I am having a similar problem. I have an existing IRA account which I used to be able to download from to Q. They changed their account servicing company and I upgraded to Q subscription from Q2017. The account is now set-up to download to Q but when I go to set-up online services in Q, it keeps wanting to set up a new account. Q will not let me use the existing account. Whether I enter directly thru the cog on the account page or go thru the Accounts list, it keeps wanting to set up a new account. How can I get this set up?