The ship-from address is used to calculate shipping rates and any applicable taxes on orders. Changes made to this address will affect both shipping and taxes immediately.
Go to Settings
From the merchant portal, choose Settings from the navigation menu, and Shipping from the dropdown menu.
Change Ship-From Address
Find the section for Shipping Address, and change your ship-from address by typing directly in to the entry field.
Save Your Changes
Press the Save button at the top or bottom of your screen.