Go to Customers
From the merchant portal, choose Customers from the navigation menu.
Find the Appropriate Customer
Either scroll through the list of customers on your Customers page or use the Search entry field to find the customer whose bill date you need. You can search by name, partial name, or email address to locate the customer.
Once you have found the person you're looking for, click on their name.
Change Address Information
On the customer's detail page, there is an Address box on the far right. Click the blue Edit text.
A dialog box will open, and you can edit the address by typing directly into the entry fields. Press the Save button when you're finished.
Save Your Changes
Press the Save button in the bottom right hand corner.