QuickBooks error code 20 appears on the screen when nothing prints from QuickBooks. It comes up with an error message stating “QuickBooks Printer not activated error code 20”. It is the result of upgraded windows 10, or if the users are trying to print from QuickBooks 2009 installed on a windows 10 system. The QuickBooks 2009 is an outdated version which shows technical issues in printing from windows 10, due to compatibility issues.