Admins and QB workers: You keep posting the same thing about this being an ongoing investigation but there is no investigation. This problem is due to a software upgrade QBDT made with respect to how reports are processed. Memorized reports with certain customizations do not open in QBDT 2020 or QBDT 2021. 

What is really aggravating for me is that I started relying on memorized reports for printing my financials because I could never get Financial Statement Designer to work on my new computer. No one at QB could help me with FSD. So after years of using FSD reports that were initially time-consuming to create, I had to start using memorized reports. It seems now that I have to recreate all those memorized reports. And for multiple client accounts. Again.

It is extremely frustrating that QB does not, either willingly or unintentionally, seem to care about the accounting professionals who use their software, and seems much more interested in getting business owners, who have no knowledge or formal training in accounting, to sign up for QB subscription services to inferior products like QBO. QB used to pride itself on serving the accounting professional and it seems those days are over. I only hope that when I reach the final straw with QB that I am about to be or already am retired. 

So if you have a ton of memorized reports with multiple customizations, you may want to stick to older versions of QBDT. It's how I resolved this issue for me.

~Victoria Foley, author of original post