OK, maybe not the normal response for a "fill in your tax return" :)
But it was the first official letter from a government agency that started with "Mw" (Short for Mevrouw - Madam).
Sometimes the joined up Dutch system can seem a little Orwellian, but they do work efficiently. One visit to the town hall, not even one form to fill in, and everything is updated!
I'm smiling :)
Now to find time to actually do the return!