To update payment information for a subscription with the San Antonio Express-News, you will typically need to log in to your account on their website. Once logged in, you should navigate to the account settings or subscription management section, where you can find options to update your billing information, including payment methods and addresses. If you do not see these options or encounter any difficulties during the process, it may be helpful to refer to the customer support section on their website. They often provide detailed instructions or frequently asked questions that can assist with such inquiries. Please note that you may need to have your account details handy for any updates. Checking the current webpage for specific guidance or contact information can also be beneficial for resolving issues related to your account.