Good evening, laura@huberinc.c.
Thanks for reaching out to the Community for support. I'd be happy to provide some information.
At this time, the option to add a new user that only has access to submit receipts isn't available in QuickBooks. I recommend taking a look at this article about User roles and access rights in QuickBooks Online.
I can see how this would be something you'd like to see, so I suggest leaving feedback for our developers by following the steps here. Comments are viewed and considered as they create new features and updates for the software.
If you have any other questions, feel free to reach back out here.