On Sunday QuickBooks was being really slow & since then I seem to have lost all my Customer Info. When I put a customer name into the customer section it says no Info?

Let’s go through some troubleshooting steps to make sure your customer's information displays properly, Bkckar.
 

First, let’s clear your browser’s cache, as outdated or corrupted cache files can sometimes block information from loading correctly.
 

If the issue persists, you can switch to a different supported browser to check if the issue is related to your current browser.

For more information on improving QuickBooks performance, check out this article: Why is my QuickBooks slow?

If you have additional questions, don’t hesitate to click the Reply button below.