If you already have a Serotek account, simply log in using System Access to Go. Please do not create a second account.
Now you must choose a user name. If you subscribe to Sero, your user name will be the first part of your Sero email address. For example, if you enter "joe" as your user name, then your Sero email address will be "firstname.lastname@example.org". Your user name can consist of letters, numbers, periods, and hyphens, but no spaces.