Hi, Xpressccs22.
Yes\, you can create an account and a service item for the fees. Once created, you can include the service item to your invoices.
You can scan through the following articles below for the detailed steps in adding an item and account in QuickBooks Online:
Add an account to your chart of accounts in QuickBooks Online.
Add, edit, and delete items.
In case you need help with managing your expenses in QuickBooks Online, check this write-up: Expenses and suppliers. This will provide you with links on how your expense transactions work in QuickBooks.
I'm always here should you have any follow-up questions or concerns. Wishing you and your business continued success!