Hi,All of my invoices have disappeared. The transactions are there but there are no invoices. It's saying create your first invoice. I have been sending invoices for age

Thanks for posting here, @saturnwolfdetail,

I can share the steps to help you rectify this missing invoices issue in QBO. 

For this, make sure you're logged on to the correct company file, in case you have multiple companies. Also, there are several sections in QuickBooks where you can find transactions and names, namely, the QuickBooks finder and the customer profile. See this link to learn more about looking up for QBO entries: How to search for transactions in QuickBooks Online.

We can also check if this is a browser related problem by opening your QuickBooks in a private window. Unexpected behaviors in the program, are sometimes affected by issues in the web browser. This is because the cache will overwrite itself and will not delete any data over time. 

Private browsers prevents cookies from being stored on your computer, making it a great place to identify browsing issues. Use these keyboard shortcuts to open a private window:

Google Chrome: press Ctrl + Shift + N  
Mozilla Firefox: press Ctrl + Shift + P
Safari: press Command + Shift + N

If it rectifies the problem, clear the browser's cache. Clearing the history or log of sites resolves most issues with the web pages.

I'm adding some relevant links to help you out with QBO navigations and other tutorials:

• Navigate QuickBooks Online: Menus, Transactions & Set Up
• Product Tutorials

Keep me updated with the result, as I want to make sure this is taken care of. I'm also here if you have any questions or need help with other QuickBooks processes. Have a productive week!