Can I change payment by Amex card here on Quick books ?

Hi there, 

Welcome to the Community. QuickBooks is designed to help you streamline your accounting. I'll be glad to share more info so you're on the right track. 

The Online Payments feature only accepts the following cards: Visa, MasterCard, Discover, and Apple Pay. It's also important to note that all funds are processed in Canadian dollars. As a workaround, I suggest checking out PayPal integration or other Payment processing apps on our app store. These payment apps can be integrated with QBO using third-party apps which you can find on our site http://www.apps.com. Once you're on the site, you can enter the name of the payment app you're using or would like to use and hit search in order to see the results.

Let me know if you have other questions by leaving a comment below. I'll be here.