Hi @Jane Spino
The IBM SPSS Statistics Trial does not use a license string. Instead it asks you to login with your IBMid credentials.
On first launch, you are given a choice of how to activate the software. For the IBM SPSS Statistics Trial, choose "Login with IBM ID".
If you have mistakenly chosen the "Launch License Wizard", and have no authorization code or license string, follow the wizard until its conclusion. Upon the next launch you should get an error with three choices. Choose to "Reset License and Restart". This will take you back to the Activation choice screen.