I am trying to update my payment method and it is giving an error message

Hello nikkimariescott,

it's essential you're able to update your payment method so you can continue reaping the amazing benefits offered in QuickBooks. Rest assured, I'll be happy to give you a hand with fixing this issue. 

First, I'd like to start off by troubleshooting this issue to determine if it's a browser-related issue.  Clearing cache and cookies is a great way to clean your browser allowing it to work more efficiently. Here's an article that shows you how to do that: How to clear cache and cookies. If this doesn't work, I suggest using a private/incognito window to see if that works instead. Try this out and let me know what happens.

I'll be one message away in case you need further assistance.