If you're referring to account under the Chart of Accounts that's linked to a different category or type, you have to edit the account itself and link it to the correct category. Here's how:
On the other hand, if you're referring to the account type linked to the item when creating transactions to your tenant, you can change it by going to the Item List.
To understand more about the QuickBooks chart of accounts, you can read this article: Understand QuickBooks Chart of Accounts.
Let me know if you have any other questions, I'll be right here to help!