Good day, tulipsayso!

You can attach a PDF copy of your receipts when you create an expense in QuickBooks Online. Though, there isn't a way to link emailed receipts with QuickBooks at this time. 

I'd suggest sending feedback to our developers to consider an easier way to enter electronic receipts in QuickBooks Online. You can click on the Gear icon, and then select Feedback. 

QuickBooks Online can also integrate with third-party apps. You can browse our app store for apps that let you link your receipts with QuickBooks Online:

https://apps.intuit.com/?locale=en-GB

If you need more help entering expenses in QuickBooks Online, please let me know by leaving a reply below.