How do I record cash income that I have not banked?

Welcome to the Community forum, @katie11_2. I'd be glad to assist you today in recording your cash income in QuickBooks Online that wasn't banked. 

In this case, we can record your cash income as a Sales receipt and deposit it into the Undeposited Funds since this isn't or won't be deposited. The Undeposited funds account in QuickBooks is used to hold customer payments until you physically deposit them into your bank account.

I've included the step-by-step process with a screenshot for your convenience:

1. Go to the +New icon then select Sales receipt.
2. Select the payee in the Customer dropdown.
3. In the Deposit to filed, select Undeposited funds.
   
   
    
4. Select the Product/Service with its appropriate Amount. 
5. When done, select Save or Save and close.

Furthermore, if the payment has already been deposited into your bank account, you can refer to this article for guidance on how to accurately record it in QuickBooks: Record and make bank deposits in QuickBooks Online.

I'm still willing to help you some more if you need additional assistance recording your cash income in QuickBooks Online. It would be my pleasure to be able to help you achieve any QuickBooks tasks. Just leave a reply below and I'll get back to you. Have a good one.