Thanks for chiming in on this thread, @NEBC_Bob. I'd be glad to provide insights into your concern about finding the Account Details section in QuickBooks Online.

Please know that QBO released and updated some features, including the Account Details section. Currently, it's now displayed in the Category Details section. You can refer to the screenshot below for your reference:

To change the affected account, go to the Category column under the Category details section. Then, you can continue following the steps provided by my colleague LieraMarie_A above.

I've added this helpful resource to learn more about recording, editing, and deleting expenses: Enter and manage expenses in QuickBooks Online.

Feel free to let me know how it goes by clicking the Reply button below. I'm always here to help you if you have other concerns. Keep safe always.