If you are using the current version of the My Docs Online you can follow the these instructions to update your credit card.  If you’re running the “classic version”  (the one with the globe as the icon in the upper left hand corner follow the classic version set of instructions.

Current Version – To update or change the credit card information associated with your account just log into the account at www.mydocsonline.com and click the “Account” button.

To the right of the screen you’ll see your current credit card information.  Just make the changes you’d like to make and click the “Update” button.

Classic Version – Log into your account and click the “My Account button.  Then click the Current Account “View/Change” link.   From there click the link next to “View Update Your Credit Information.”  You can update your credit card information from there.