See if she can print from QuickBooks to PDF. That eliminates the printer and printer driver. If that works its still something related to the printer. In that case, try holding down the option key when choosing the Print menu in QuickBooks. I believe that clears out some configuration information that might be corrupt. Although maybe its holding the option key when you click the OK in the printer settings window? Try both....
The other thing is to look at the printer settings dialog and go over all the options and make sure something isn't screwed up (like scale set to .1% or something like that). Again these are printer settings - if it prints out to a PDF ok then its not QuickBooks itself. If it doesn't then we may have an issue - sometimes fonts are corrupt so that's a thing, too, but these are getting increasingly rare.
If it does print to a PDF you can try printing the PDF from Preview and see if that works. Again this can help figure out what's wrong.
