i am trying to change the email on a supplier remittance

Welcome to the Community, sales306. Modifying the email associated with a supplier remittance in QuickBooks Online (QBO) is a straightforward process. Below, I'll provide a step-by-step guide to assist you in completing this task efficiently.

Here's how:

1. Log in to your QuickBooks account.
2. Go to the Expenses tab.
3. Select Supplier and find the vendor whose email you need to update.
4. In the supplier profile, click the Edit button at the top right to modify the supplier's details.
5. In edit mode, locate the Email field and change it with the new email address.
6. Then hit Save.

I've included screenshots below for your complete reference.

On the other hand, you can use the suppliers tab to add and track them: Add and manage suppliers in QuickBooks Online.  

For future reference on how to view and edit transactions with your suppliers in QuickBooks Online, check out this article: How to view and edit supplier transactions in QuickBooks Online.

You can return here anytime you need further assistance changing your supplier emails or any QuickBooks-related concerns. We're always here to provide prompt assistance. Have a nice one.