The requirements and number of stuff needed to be checked during an SEO technical audit have changed dramatically over the past few years. Let it be the inclusion of the mobile features or about the international or local targeting features. This checklist should help you put together a thorough site audit and determine what is holding back the organic performance of your site. At the end of your audit, you won't be writing a document that says what's wrong with the website. Instead, creating a document that says what needs to be done. Then explain why these actions are important.
http://moz.com/blog/technical-site-audit-for-2015