They give you either a link where you complete the census online or a physical booklet with all the questions present to collect data from the population. What happens if you continue disregarding the census in the US? When was the last census conducted on the entire country? Even then, is answering questions on the census mandatory for both citizens and tourists alike? Also, what are the repercussions for providing false answers?
There is no punishment for not filling out the census so it isn’t mandatory to complete it. Census workers will do their best to count the people in the household based on what information they have if you don’t do the census, so it really is better to just fill it out to increase accuracy.
There is a punishment, on paper. You can be fined for not filling it out, or fined more for willfully lying on it. But, they have no enforcement arm, so it would be up to the Justice Dept to press charges, and I doubt they would bother.
https://money.com/what-if-i-dont-do-the-census