How do I turn off that annoying sound when capturing receipts

Welcome to Intuit Community, davidlegette.

At this time, we're unable to turn off the sound for capturing receipts in QuickBooks Online (QBO).

Being able to add an option that allows a user to turn off the sound when capturing receipt is a good idea. While we continue to work in making improvements to the product and meeting our customers needs, please check out our QuickBooks Blog. From here we post the most recent news and updates with our product.

Here's more about the Receipts feature in QuickBooks Online: Capture and categorize receipts and bills.

Get back to me if there's anything I can help you with. I'd be happy to assist you further. Enjoy the rest of the day.