Hi pemrich. Glad to have you connect with us here. I'll be happy to share more info about our Online Payments platform. Our payments platform only accepts Canadian dollars. The CAD payments can be processed using Visa, Mastercard, Discover, and Apple pay. I recommend looking at third-party payment processors such as PayPal, Stripe, or Square for your AMEX payments. The good thing is QuickBooks Online makes it simple to integrate other payment processors into your account. You can use a third-party app which you can find on http://www.apps.com. You'll just have to search for the payment processor's name and select the one that best suits your needs.
Let me know if you have additional questions, I'll be on standby.
