They do, but probably not the same data, because taxes aren't really affected by you traveling somewhere, and they might owe you money if they figure out you're

They do, but probably not the same data, because taxes aren't really affected by you traveling somewhere, and they might owe you money if they figure out you're married and just forgot to tell them. The other thing is of course that you don't want to piss off the people who give you money, while you don't worry too much about pissing off the people who take money from you. If you drive those away who give you money, you have less money. If you drive those taking money away, you have more money. https://skat.dk/data.aspx?oid=2303874&lang=de https://skat.dk/data.aspx?oid=2303874&lang=de