My customer and vendor drop lists are not working, I'm not able to choose a customer to bill to

Hi there, CBond15 and Mellie05. Let me route you in the right direction for support regarding the issue with the dropdown arrow in QuickBooks Online.

Our product engineers have successfully resolved the issue of unresponsive dropdown menus in multiple areas of QuickBooks Online, including invoices, credit memos, and banking. If it persists on your end, I recommend contacting our Customer Care Team so they can review your account in a secure environment and further investigate why you're still experiencing the matter.

Here's how to reach us:

1. Go to the Help menu and select the Search tab.
2. Then, click Contact Us.
3. Then, enter a brief description of your concern and select Continue.
4. Lastly, choose either Start a Chat or Get a Callback to start connecting with them.

You can check out our support hours in this article to ensure your concern gets addressed promptly: QuickBooks Online Support.

For future reference, here's a guide on generating reports to get a comprehensive overview of your business: Run Reports.

Please let me know if you have any other concerns about the dropdown menu in QuickBooks. I'm always here to help. Take care!