Hello, Lindles. 

The first answer I respond is for QuickBooks Online. However, I already update my answer and shared a screenshots for QuickBooks Self-Employed.  

 If you'll still unable to locate the Email message or Preview, we can isolate this case using a private window to verify if this is related to your browser issue. 

There are times that the browser stores frequently-accessed data, thus causing some errors or unusual behavior.   

Let's try logging in to your QuickBooks Self-Employed account using a private or a different browser. Here's how:

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

If it's works, you'll need to clear the browser's cache. Clearing the cache or cookies is the best way to get a clean slate for your browser. Or you can use other compatible browsers. It could be that the one you're currently working on has a temporary issue with QuickBooks.       

If you have any other questions, don’t hesitate to comment below. Have a great day!