How you login to your site to make edits depends on which platform you are on.
WordPress clients:
To login, use this format: http://www.YOURDOMAIN.com/wp-admin
TextWizard clients:
To login, use this format: http://www.YOURDOMAIN.com/textwizard
Architect clients:
To login, use this format: http://www.YOURDOMAIN.com/app/login