Hello,

Thank you for posting here in the Community. I can help you fix the issue with printing invoices in QuickBooks Online.

The problem usually happens when there's an issue with your PDF viewer when printing invoices. I recommend performing some troubleshooting steps to isolate and fix it.

Start with using a supported, up-to-date browser to avoid issues with printing and managing invoices. You can check our system requirements for QuickBooks Online.

Next, I recommend you perform the test sequence for PDF printing issues to identify the cause and resolve the problem. Please follow the steps in the order shown in this link, which includes steps in updating Adobe Reader: How to update, repair, or re-install Adobe Reader/Acrobat.

Also, did you know you can personalize your sales forms using templates before printing them in QuickBooks? I've included a link you can check out to learn more about the steps: Customize invoices, estimates, and sales receipts in QuickBooks Online.

We're just a post away if you need further assistance printing transactions or creating invoices. We'll be sure to lend a hand. Have a great day.