Using Quickbooks Online, is there a list of all Intuit transaction fees available so I can match each fee to a payment received?

Good to see you here, userhapimgmt.

I've got some information about your concern. 

To learn more about the fees for QuickBooks Payments, you can read this article: Standard Payment Fees & Rates.

You can also log in to your Merchant Service account and review the fees by following these steps:

1. Sign in to the Merchant Service Center from a web browser.
2. Go to Activity & Reports and select Fees.

Here's a sample screenshot for a visual reference:

I'm adding these articles for more information about QuickBooks Payments:

• Common questions about payments deposits in QuickBooks Online
• Process payments in the Merchant Service Center

Should you have any additional questions or other concerns, please let me know in the comments below. I'll be around to help you out again. Stay safe!