My invoices are printing in symbols instead of the correct letters

I most cases, it's had to do with your printer driver. Had you updated your printer driver to the latest one? If not, update your PDF software to the latest version.

Thanks for joining the Community, @aportune1. Allow me to get you pointed in the right direction for printing your invoices.

There are multiple factors that can affect printing in QuickBooks Online, such as alignment settings and the PDF viewer. I'm including some articles to guide you on troubleshooting printing:

• How to Troubleshoot Printer Problems in Windows
• Test Sequence for PDF Printing Issues
• How to Troubleshoot Printing Errors in Safari

These resources are a great place to start for printing.

Should you have any questions about these resources or anything else, I'm just a quick post away. Hope you have a great weekend ahead.