How To Change the Email Address in Your Squarespace Contact Form

First navigate to /config/pages then find your contact page in the left sidebar and click on it. When the page appears in the main window (to the right of the sidebar), hover over the contact form until EDIT appears at the top, then click on EDIT:

Next hover over the top left of the contact form itself until the word FORM appears, then click on the word FORM and a Pen and Trash can appear. Click on the Pen (Edit) and a pop-up will appear to the right of the form.

On the pop-up, there are three tabs: Content, Design, and Storage. Click on the the storage tab to find and change your email notification address:

Hope that helps!