Quicken Deluxe R65.29 reports "TurboTax Import Failed! (Error 2). See post from 2024 for the same error. I've already reported this to the Quicken Phone Support team and referenced the CTP number from the post below.
The file name I tried to import was C:\2025.tax2025. It doesn't get much shorter than that.
[Edited - Enabled Link]