Use the translate.csv translation file in your topic. For demo purposes, I will use the default theme in the default package (app / design / frontend / default / default). You can apply the following steps to your topic.
How to change the label using a translation file:
- Open application / design / interface / default / default / locale / en_US / translate.csv
Add new line:
"Billing Information","Shipping and Billing Information"
Make sure your repository uses the correct language ("en_US").
Log in to the Magento backend and go to System> Configuration> General> General> Locale Settings tab. "Locale" must be set to "English (United States)" (either by directly configuring it for a particular type of store, or by inheritance using the website configuration / default).
Make sure your repository uses the default / default directory. This can be set in System> Configuration> General> Design. The default is "default / default".
Refresh or deactivate cache.
Go to the verification page. The label text should now be "Shipping and Payment Information."
How to change text for Mage_Checkout texts only:
If you want to change the "Billing Information" only in those places where the verification translation assistant is used, you can change the line in translate.csv as follows:
"Mage_Checkout::Billing Information","Shipping and Billing Information"
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