Changing Contact email address forwarding

I "host" a client's site on my square account and when someone submits an email on their contact us page, it comes to my email address. How can I get it to go to the client's email address? I don't see anything in the form where I can change the address.

Click to edit the form. 

1. Under Storage options, click X next to the address.
2. Enter a different email address.
3. Click Connect. The address box will display Sending to when it's successfully connected.
4. Click Apply or Save to save your changes.