Let's make sure you're able to save notes in QuickBooks Self-Employed transactions, petelake.

If you're adding a note on the Transaction menu, make sure you click the arrow right on the lower part of the Attach receipts icon. I've added these screenshots to show you how.

However, if you're still experiencing notes being deleted, let's perform some steps to fix the issue. You can log in to your QuickBooks Online (QBO) account in a private window (incognito). Here are the keyboard shortcuts:

• Press Ctrl + Shift + N (Google Chrome).
• Ctrl + Shift + P (Firefox).
• Control + Option + P (Safari).
  
  

Once signed in, you can try adding the notes and double-check if you're still able to see it after you log back in. If so, return to your default browser clear cache to speed up the loading process. Every so often the cache becomes overwhelmed with older data which can potentially cause viewing and performance issues. Clearing it will refresh the system, and you'll be able to work with a clean slate. However, if the issue persists, try using other supported browsers. 

I have added these help articles in case you have any questions about QuickBooks Online. Please know that I'm only a few clicks away if you have any other issues or concerns. I'm always here to help. Enjoy the rest of the day!