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