Thanks for joining in on this thread, @IsabelCS.
We can perform some troubleshooting to see if this is a browser-related cause.
I'd like to start by opening a private or incognito window in your web browser. This will open your account in a clean slate and loads fresh data. Here's how:
Once you're in the private or incognito window, sign in to your QuickBooks Self Employed account and try to delete the receipt. If it works, you can go back to your original browser and clear the cache. Alternatively, you can use other compatible browsers.
Let me know how this goes for you. If the issue persists or you'd like further assistance, please don't hesitate and reach back out to me. I'm always here to help. Take care!