Edit Your Contact Form Email Address
By default, contact form entries are delivered to the email address registered to your account. To switch this to a different email address:
Go to your Square Online Overview page .
Click the Edit Website button.
This will open your Square Online site editor.
Select your contact form page and click on the form to view options.
Click Form Settings on the left to expand that section.

Enter the email address in the Email Notification field
Publish your site.
All future form notifications will be sent to this address.