To enter your access key ID and secret access key, go into your account on the top right and click ‘Setup Mechanical Turk’ from the drop down list. If you haven’t yet signed up for a mechanical turk account, follow the instructions on the page. If you have an account already, scroll to the bottom and enter your access key ID and Secret Access Key in the appropriate fields. After you insert the information, you should be directed to a ‘Success’ page that says “Your account has been updated. All surveys will be run using your Amazon Mechanical Turk Account”.