You can edit a customer on the customer card. There is no "Edit" button on the customer card. Just make the relevant changes and they will be saved automatically. You will see "All Changes saved" at the top right-hand corner of the customer card.
1. Navigate to the "Contacts" screen, select the "Customers" tab from the top of the table and click on the customer name you wish to edit.
2. Change the value of any field and your changes will be saved automatically.
On the customer card, you can edit all the fields available.
If you have connected to a e-commerce platform or an accounting platform then going through reconnection will also give you an option to resync customer data, including address data. Read more about reconnections here: Shopify, WooCommerce, Xero, QuickBooks.
Read more here on how to manage your customer address information.