First thing to do is Log in, then:

• Click on MyAccount
• Click on Article tab... you should see all articles that you are an author and are published*...
• Click on the article you wish to view
• Click on the edit icon in the upper left hand corner
  Make changes
• Click Save

Note:
Authors will not see their articles in the Article tab once the draft is accepted for web publishing...

If you are a manager, your edits will show up once the web site refreshes...

If you do not see an article you are not the author, editor, publisher, manager... or it is not published...

Articles published final on the web are transitioned to the webmaster as the author...

Authorship of initial articles in draft will remain with the originating author and will be initially published on the web to allow updates...

If your editor seems strange or you do not see an editor (like MS Word icons) you may not have selected an editor in you HSC Account...
Go to MyAccount, Edit HSC Account select an editor of choice in Web Settings tab...