We also know that this premise is simply wrong, Census is statistical survey, no party in the world is legally allowed to inspect the contents of the individual form via Title 13.
Counting illegals is not possible under the Census currently or in any point in the future most likely
Counting illegals is not possible under the Census currently or in any point in the future most likely
https://www.law.cornell.edu/uscode/text/13/9
https://www.census.gov/topics/population/foreign-born/about/...