I confirmed that this is also the case with the 2020 version of both software. You must let Turbotax open the quicken file for the import to work. If the Quicken file is already running you will get the message to make sure that quicken file is open and it just switches to the open quicken file and then does not do anything. However, if you close the quicken file and then let turbo tax open the file it works.
