You can register for an account at https://www.daz3d.com/customer/account/create/
You will need to fill out a form that asks for your first and last name, a current email address, and to create a password. Once you have done this, a confirmation email will be sent to you. Please be sure to click the link in the confirmation email. DO NOT RESPOND to this email, as it is a noreply email. Once you click the link in this email, your account will be activated. You will then be able to log into your Daz account with the email and password set up during registration.
Many ISP's, Mail Services, and spam blockers filter out our Confirmation e-mails. Please be sure to have the @daz3d.com domain, in particular firstname.lastname@example.org, email@example.com, and firstname.lastname@example.org allowed through any firewalls, email filters or spam blockers that you might have.