You can find this page under SETTINGS> CUSTOMER ADDRESSES.
You can add an individual customer address by clicking +ADD NEW.
You can add multiple customer addresses in bulk by selecting the Upload Addresses option. This will take you to a new page where you can upload a CSV file. The file can be no larger that 3 MB.
You will then map each field to their respective field in ShippingEasy.
NOTE: Make sure all of your columns have headers.
You can edit an individual customer address by clicking the pencil icon on the far right end of the customer listing.
You can delete an individual customer address by clicking the on the far right end of the customer listing.