I can't print or preview any reports in my Quickbooks online any more. Can anyone advise please?

Hi, cagiles55.

I can help troubleshoot the issue with previewing and printing reports in QuickBooks Online (QBO). 

First, let's determine if this is an issue with the Adobe PDF viewer integrated with the browser. I suggest opening this test file: PDF Test file. When you can open the test file just fine, it's a good indicator that the issue could be a temporary browser problem. I recommend ensuring your browser is supported and up-to-date. Alternatively, you can also access your account through another browser and preview reports from there.

Next, if you can't open the test file, I recommend updating your Adobe PDF reader and retry previewing reports in QBO. Please refer to this article for a detailed guide on the update process: How to update, repair, or re-install Adobe Reader/Acrobat.

For future reference, let me add this article about customizing your reports in QBO to focus on the details that matter the most to you: Customize reports in QuickBooks Online.

We're always here in the Community if you still can't preview or print reports in QBO. We'll do our best to assist. Take care.