All of my invoices, sales receipts, customers, and expenses have disappeared

Hi there rakonowalchuk-ho,

It's important that all your transactions be entered correctly for your books to be well balanced. QuickBooks Online is a great tool able to help you keep track of sales and expenses so you can see the profitability of your company. I can point you in the right direction for assistance with missing transactions in QuickBooks Online.

One possible cause when not being able to see your transactions would be browsing data. These temporary files can accumulate in your system and cause errors in any cloud-based software like QuickBooks Online. You can resolve errors caused by browsing data using these steps before logging into QuickBooks Online:

• 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 trying these steps, I recommend reaching out to the QuickBooks Online support team outside of the Community. They'll be able to view the error with you in a secure setting in order to provide further troubleshooting as well as collect the necessary information to notify the engineers if the error is still present. 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.
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If you have any other questions, feel free to reach out here.