How to use payment links in Quickbooks Online
Payment links allow you to create and share a link with your customers to collect their payment. They work once, and will automatically expire after your customer pays you.
Payment link is great for getting paid for a single product or service from a single customer when you expect them to pay you within a day or two.
However, if you need to create an invoice to give your customer more time to pay then you should add an online payment option to your invoice instead.