Creating and maintaining postal codes Use the Postal Codes form to add, edit and remove postal codes. To create and maintain postal codes: Select Administration > Configuration > Postal Codes. The Postal Code screen is displayed in insert mode. In the Postal Code Details section, specify this information: Postal Specify the postal code. Country Specify the country of the postal code. City Specify the city of the postal code. State/Province Specify the state or province of the postal code. Geographic Code Specify the geographic code of the postal code. Click Save. The code is saved and updates the Postal Codes list.