To obtain a Daz Studio serial number you will need to first log into your DAZ 3D account. If you have not yet registered an account with us then you may do so by navigating to this link
Once you have completed the registration process and you are successfully logged in you may navigate to this link http://www.daz3d.com/i.x/software/studio/-/sreg? to receive your unique DAZ Studio serial number.
Select the appropriate platform when prompted. You will then be issued a serial number that may be used with the DAZ Studio application.
Remember, if you ever need to refer back to this serial number in the future it can be located in the "Available Serial Codes" section of your account.