Thanks for posting your question here in the Intuit Community, erica7,
I'm here to help share information on how to change account types in QuickBooks Online.
Here's what you'll need to do:
For more detailed steps, here's a great resource that you can check: How to change the type of an existing parent account or sub-account.
That's it! Please let me know how it goes. I'm always here to help. Have a great day!