I am an EU Citizen and the car has EU registration in my country.
I don't understand anything about this "vehicle tax", it says that I must pay it before I enter Finland, and then it is returned, can someone please explain to me?
https://www.vero.fi/en/individuals/vehi ... d_vehicle/
They say "Don’t forget to complete a tax return (in Finnish or Swedish) for car tax in five days after you submitted the declaration of vehicle use."
What is this tax return? Why am I supposed to pay tax in the first place for the car if the state is going to return it to me later?

Can someone who has arrived from another EU country to Finland explain to me everything?