QuickBooks PDF converter activation error -20. You can not print directly to the QuickBooks PDF converter. Try using the QuickBooks Save as PDF option.

This is error seems to occur on 64Bit systems that Quickbooks is installed on, and you are trying to print or email the invoice or purchase order from within quickbooks.

The issue relates to a 32bit pdf driver that Quickbooks uses.  To fix the problem you must install the 64 bit pdf driver that quickbooks uses.

1. Firstly download the Amyyuni 64Bit Driver from intuit.
2. Unzip the driver to a new folder and run install.exe
3. Now go to your printer drivers and rename the printer QuickBooks PDF Converter to something else
4. Now rename the ‘Amyuni Document Converter’ to be call ‘Quickbooks PDF Converter
5. Restart your quickbooks if it is still running and test it out!

This worked for my after finally finding the solution on the intuit site.