I'd be glad to share some insights on how to capture your revenue in QuickBooks Online, @Kamrocapital.
Since you don't issue invoices to your clients, what we can do is to create a bank deposit. Then make sure the affected account are Income account to track interest earned.
Here's how
Choose the + New button.
Click Bank Deposit.
From the Account ▼ dropdown, select the account.
Select the checkbox for each transaction you want to combine.
Make sure the total of the selected transactions matches your deposit slip. Use your deposit slip as a reference.
I'm also sharing these link you can utilize to help record, track, and use loans in QuickBooks Online: Manage and track customer loans.
Feel free to get back in here if you have additional questions in capturing your revenue which is charged in form of fees. I'm always around to assist you. Keep safe!
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