After you log out for the first time, you will need to know how to log back in to your website.
NOTE: Your Squarespace site, before you login, is how the public will see it online. Once you login, additional editing buttons appear, allowing you to add content and customize your site.
Visit your site at: http://youraccount.squarespace.com (substituting youraccount with your actual account name). On the navigation sidebar of your site, click the link that says Login.
From this page, enter the login name and password you created. Then click the Login button.

Did you remove the login link from your site? Log in to your site at http://youraccount.squarespace.com/display/Login (substituting youraccount with your actual account name.)
Still not working? Check out our Common Login Issues documentation.