All my customers have disappeared in my QuickBooks. Can't look up their history or anything. Is this a glitch? Can I get them back somehow?

Hi there lesagepropertyma,

it's vital that all your transactions are correctly entered for your books to be well balanced. QuickBooks Online is a great tool able to help you keep track of invoices and payments to see how much money is owed by each customer. I can provide some information about missing information in QuickBooks Online.

One possible cause for missing information such as your customer list would be browsing data. These temporary files can accumulate in your browser, computer, and network and cause errors like this in any cloud-based software like QuickBooks Online. Here are some steps to resolve issues caused by browsing data:

• Clear your browser cache if you're using a browser
• Try a browser if you're using the app
• Try a private browser window
• Try another browser type
• Make sure you're using a supported browser and system
• Reset your Internet or try on another computer or device

If the error persists after those steps, then you'd need to reach out to the support team outside of the Community for assistance. They'll be able to view the error with you in a secure setting to provide more troubleshooting steps, as well as collect the necessary information to notify the engineers of the missing customers. You can reach them using these methods:

Schedule a Callback or start a Chat: click (?)Help in the upper right > type and enter "Contact support" into the QB Assistant > click Contact Us > explain your situation > click Let's Talk > choose Get a callback or Start a Chat.
Social Media: Facebook and Twitter

If you have any other questions, feel free to reach out here.