Now that you have your store, started, you need to set up some basic information to make it your own. Go to the Store page and then click Setup.
Click Edit to enter your store information: name, address, email and optional phone number. What you enter here is what displays on all your generated store communication, such as invoices, orders, and emails. By default, this address is also used as your shipping address, but you can change that when you set up Shipping.
More info about the different addresses for your store can be found here.
Click Save when done. To make changes once you've saved your info, click the Edit button again.