I know the possible reason why only the top row is visible when exporting the Unpaid Bills report via Excel or PDF, Becky. Let me guide you through the measures to address this problem. 

Since you mentioned that other reports are working fine, you could be experiencing a browser-related issue. Accumulated cache files sometimes cause unexpected behaviors within the program. To fix this, we can perform basic troubleshooting steps.

Start by opening your QuickBooks Online (QBO) account using a private or incognito window. Refer to the keyboard shortcuts below:

• Google Chrome: Ctrl + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Microsoft Edge: Ctrl + Shift + N
• Safari: Command + Shift + N

Then, export the report again to Excel or PDF. If this resolves the problem, return to your default browser and clear its cache so the system can restart. Alternatively, you may utilize other supported browsers.

However, if the issue persists, another option is to switch to Classic view and export the file. Here's how:

1. Go to Reports and enter Unpaid Bills in the Find report by name search box.
   
   
   
   
2. Tap Switch to classic view in the upper right corner.
   
   
   
   
3. Click the Export icon and choose Export to Excel or Export to PDF.
   
              
   
   
   
   

Additionally, I'll drop this article to assist you in modifying the content and layout of your financial records: Customize reports in QuickBooks Online.

Finally, to leverage the capabilities of your reports, consider using our QuickBooks Live Expert Assisted service. They are ready to offer guidance and share best practices based on extensive experience helping clients.

I want to ensure you can successfully view your data when exporting the Unpaid Bills report, Becky. If you have other questions about running reports in QBO, post a reply below.