Support for Drupal 7 is ending on 5 January 2025—it’s time to migrate to Drupal 10! Learn about the many benefits of Drupal 10 and find migration tools in our resource center.
e-Commerce v4 has been in progress for quite a while and there are work-in-progress documentation below and also on http://www.drupalcommerce.org/user-guide.
Documentation for versions prior to v4 is all below.