If QuickBooks won't print or save as PDF, start by running the PDF & Print Repair Tool inside QuickBooks Tool Hub, under the Program Problems tab. If the issue continues, restart the Print Spooler service, check that the QuickBooks PDF Converter appears correctly in Devices and Printers, and confirm your printer works outside QuickBooks. Updating QuickBooks Desktop and repairing Microsoft .NET Framework also resolves many persistent printing and PDF creation failures.