Thank you for posting in the Community. I'd be happy to help share some information about importing a receipt into QuickBooks Online (QBO).
Currently, you can only import list data into QBO. In the meantime, you might want to try turning your phone’s camera into an instant receipt scanner using the QuickBooks app.
Just download the Receipt Scanner in the App Store or Google Play. After that, simply snap a photo of a receipt and QuickBooks will attach it to the expense in your books. Also, the scanned receipt is saved as a digital file for documentation at tax time.