Log into Paychex.
Click on your initials in the top-right corner of the dashboard and Switch to Administrator Account if you are not there already.
NOTE: If you do not see this option, you are not an Administrator and will not have the permissions needed to set up this integration. Please find a user in your organization with the right permissions.
Click on User Access in the left-hand panel.
You will be able to see all Admins for your organization — as long as you are not a Security Admin, you have the permissions needed to set up this integration.