Use the American Express onlinepayment features to simplify the process of paying your American Express credit card. This online service is available for all of. American Express EPAY is a service that gives you the ease and convenience of making online payments in a quick and secure manner. Pay your income tax, property tax, college tuition, utility and other bills online with a credit Use your American Express ® Card to pay your federal, state and local taxes Official Payments does not endorse the products or services of these. Site FAQ Contact Us Change Country Log Out. Let me know if this helps. Please note that after a successful transaction, your payment will be credited to your American Express Card Account within business days. By Tamsen Butler Personal Finance Specialist. Back to search results. I am able to import transactions for the AMEX card and select the appropriate expense account but just free slot games offline into an issue with the most recent payment transaction.