Thank you.  I have been using QB Pro Desktop 2012 ( I also have some company files however in QB 2008). I am in the process of upgrading to QB Pro Desktop 2021. In reading on the QB community as well as your comment above there seems to be some posts which say that QB Desktop Pro 2021 needs to have the 2008 and 2012 company data files converted to perhaps the 2015, 2016 and/or 2018 editions before conversion to the 2021 data file?  I assume these conversions can be done with trial versions since those editions are no longer retail available. 

How do I download or get access to the prior trial versions?