How do I store and match a physical receipt to an expenses transaction. EG Fuel purchase/receipt?

Glad to have you here, psellick8.

For now, the Receipt tab is only applicable in the US version. This feature is good to be added in your book. 
I'm making sure to forward the information you've shared here to our software engineers. It might be given a chance to be included in the next product update

We can attach the receipt by adding them in the Attachment field when creating an expense transaction.

Please know that I'm right here anytime you have questions with QuickBooks. I's be glad to provide you further information about your concern. I hope you're good. Take care!