I mistakenly"Received Payment" on an invoice I just recently sent out. How do I correct it to show waiting on payment?

I can definitely help you with that, keonaona.

We can simply delete the payment you've accidentally added. This way, the invoice will be marked as open (waiting for payment) in your reports. Let me guide you how:

1. Click the Magnifying glass icon.
2. Under Recent Transactions, locate then open the invoice payment.
3. Select More at the bottom.
4. Choose Delete, then click Yes to confirm the changes.

Take a look at my screenshot below:
 

After your customer pays their invoice, it's time to record and categorize the payment. You can either deposit the money to your checking account or to the Undeposited Funds account.

With QuickBooks Online, you can also personalize the invoices so your customers will recognize your brand.

Do you have any other questions in mind? Feel free to leave them below and I'll get back to you as soon as I can.