I have to jump in here and say that this feature in quickbooks online does not work how it should and needs to be modified.  There is zero benefit to subclasses. All engineering needs to do is run a class report in Quickbooks desktop (which works the way it should) and run a class report in quickbooks online and can see the deficiencies. I should be able to see class levels

Program

sub program sub program subprogram

This is an unfortunate error in reporting for QB online making subclasses virtually useless.