I have QB Desktop Accountant 2020 and I just started having the same problem with pdfs this week.  I can open my quarterly payroll forms fine.  They open as pdfs, but when I go to print them--nothing happens and then I realized that after I do this, NONE of my other pdfs will open, even outside of QB. --It's as if QB crashes the Adobe Reader software.  I can fix this by saving the payroll forms as a pdf and then restart my computer--then I can print the pdf.  I, too, have run the QB tool hub (all available options), and still no fix.  I can work around this for now, but W-2s in January will be a nightmare if this doesn't get fixed. Please help