How do I record an over-payment on an invoice ?
Let me help you record the invoice over-payment, Lesley.
When you receive over-payments from customers, you can either include it to the invoice payment or create a credit memo. Here are the detailed steps:
Include the over-payment when you pay the invoice:
Create a credit memo:
Then, you can use it as payment for the future invoices. Feel free to browse this article for more information: Apply a Credit Memo, Credit or Refund to a Customer.
I'll be around if you need more help with this.