How do I change the "Sales Message Goes Here"?

[afo]

Looking at one of my Zen Cart installations using admin>tools>developers tool kit, I found

Line #21 : define('HEADER_SALES_TEXT', '<h1>Sales Message Goes Here</h1>');

in includes/languages/english/classic/header.php

If you are going to change it, save the changed copy in the correct folder for your templates, not in /classic.

Try searching in the admin for the literal (I usually use the search box at the bottom of the screen).

The header.php you posted has

define('HEADER_SALES_TEXT', 'TagLine Here');