QBO - Marking Customer Invoice as Paid

It's great to have you here, @ASK81.

Let's make sure you're able to record customer payments in the program. If you use an external platform to process payments, you can keep track of those payments in QuickBooks by manually recording the payments.

Here's how:

1. Press + New, then select Receive payment.
2. Add the customer name in the Customer dropdown.
3. Fill out the Payment method.
   
4. From the Deposit to dropdown, select the account you put the payment into. Tip: You can put the money directly into an account, like your chequing account, or select Undeposited Funds if you need to group the payment with others.
5. In the Outstanding Transactions section, select the checkbox for the invoice you're recording the payment on.
6. Add a Reference no. or Memo if needed. This is optional.
7. When you're done, select Save and close.

Check out this link to know more about how to record invoice payments manually.

Let me know if this helps or if you need further insights about applying customer payments. I'll be on standby here to further assist you. Have an awesome day!