Go to Customer Form > Contacts & Address tab

Hover the mouse over the different menu options. If the cursor changes to a hand (), then click to go to the subject.

To add Addresses to a Customer’s Account, open the Customer form.

Click on the “Add Address” (1) button.

Type in the address information, button (2)

and select the Address type, button (3)

Remember to save before closing the screen.

https://bit.ly/SI_Contacts