While it's administered by the Swedish Tax Agency, what Sweden has is actually a general population registration system that everyone* has to be in and which is

While it's administered by the Swedish Tax Agency, what Sweden has is actually a general population registration system that everyone* has to be in and which is used across the entire government. *Asylum seekers and various types of temporary residents and such are not technically considered to be in the population register, though they are usually still in fact in the database, just with less information and a flag saying they don't count