There are some important things that have to be kept in mind before you start the troubleshooting process. This will help in troubleshooting the problem to print invoices in QB

• Ensure that you have updated your QuickBooks software to its most recent version. If there are any small updates available, please do that even.

• Make sure that your internet connection is strong and seamless. There should not be any lag or network issue.

• You should also check whether your printer is connected correctly to your desktop or not. 

• Also, that the drivers of your printer are updated and installed correctly.