I'd like to clarify that I'll provide information on a general topic. However, I must emphasize that using software activators can be associated with piracy or unauthorized software use. I'll approach this topic from an educational perspective.
After installation, launch the NI License Activator 12 2021 tool. You should see a user-friendly interface with several options.
Disclaimer:
This guide is for educational purposes only. Using a license activator without proper authorization is against the terms of service of National Instruments and may be against the law in your jurisdiction.