1. Log in to your Squarespace account and go to the ‘Domains’ page.
2.Under ‘Domain Settings’, click on the ‘+ Add Domain’ button.
3. Enter the subdomain name that you want to use in the ‘Domain Name’ field and select ‘Add as Subdomain’ from the ‘Domain Type’ drop-down menu.
4. Click on the ‘Add Domain’ button to save your changes.
You have successfully created a subdomain for your Squarespace website.