Where can I find and complete the Self-Assessment Questionnaire?

Hackerguardian provides a free wizard that guide merchants and service providers through each stage of self-assessment questionnaire. More details on the wizard can be found : here

Merchants have to answer all questions with 'Yes' or 'N/A to be considered PCI compliant. Answering 'No' to any question means the merchant or service provider is not compliant. The risk(s) identified by the questionnaire must be remediated and the questionnaire retaken. After creating a user name and password, merchants can save their progress at any time. Following successful completion of the questionnaire, merchants will be provided with official certification that can be submitted to their acquirer.