Same here. I called and said I would not fill it out. They kept insisting that by law I had to. They sent a card and another survey which I promptly pitched.
I’ve been trying to do research, via the U.S. government census, about my paternal grandfather’s family. Like “who they really are?”
On the 1920 census he said he was born in Kansas (it was actually East St. Louis) and that his parents came from New Jersey (they didn’t!). But there are no records as to that fact. His mother was supposedly born in Memphis, TN, but there is no record and seems to have come from nowhere, though we know her family emigrated from Switzerland, and 6 brothers with her family’s name landed in New Orleans back in the 1840’s. Evidently lying on the census isn’t something new!