I have tried to upload receipts from a folder in Dropbox. using dropbox transfer and emailing the receipts to QB, Dropbox says they have been sent but not showing in QB?

Hi joanne-nolan2, thanks for joining us on the Community. Receipts must be emailed to QuickBooks using your @qbodocs.com address and can only contain one receipt per image or file. 

For full details, check out our guide on emailing receipts and bills to QuickBooks Online. Thanks for reaching Intuit support. We're just a post away if you have any further queries.