I have heard that the government has launched a system where everyone must register upon entry to Norway. Do I have to register my personal information?

Yes, you do. Everyone traveling to Norway must register information about, amongst other things, name, contact information, quarantine stay, and potential employer. The main rule is that everyone who crosses the border, including Norwegian citizens, must register.

Read more about entry registration here, and to proceed to the digital registration form (external website).

The UDI does not have more information than what is written on the government's website and cannot answer questions about it.