I have received part payment for a customer Invoice. How do I record this and balancing payment in Quickbooks Online.

Hello Dickens, 

Welcome to the Community page, 

What you would do is go into the invoice and click on receive payment and just enter in the amount that you have received off the customer and save it. Then when the rest of the money comes in to you , all you need to do is go back into the invoice again and click on receive payment and enter in the remaining amount and then click save.