Log in to Your Mailchimp account
Click on the Lists Tab
(1) Click on the lists tab
(2) lick add people link
Add the new contacts details
Fill out the form fields. Any field with an * is a required field
At the bottom of this form you will find a check box, you MUST confirm that this person has given you permission to use their contact details.
Then click subscribe, the new contact will have been added.