One of my active clients does not show up in my client list. I am still their bookkeeper/accountant and they are still in my billings.

Hello bwilliams2, 

Welcome to the Community. It's important you're able to view your active client so you can continue to navigate the program with ease.

In case you're experiencing browser-related issues, I recommend clearing cache and cookies on your browser. Clearing cache and cookies is a great way to clean your browser allowing it to work more efficiently. Here's an article that shows you how to do that: How to clear cache and cookies. 

I look forward to hearing back from you in the comments below. I'll be here.