It went out earlier this week.
From profession and personal interests, this is one of the most important documents that you will fill out in your role of being a resident of the USA. If you are one of those that receive the long form, asking all sorts of personal questions, feel comfortable answering the questions in full honesty with the expectation that the disclosure will be kept secret as it pertains to your personal self or personal situation.
The same for anyone else receiving the regular short form. (Sophisticated statistics are used to magnify the responses from the long form to represent the population response received in the short form).
It is advised that you are totally safe by being entirely honest. Your honesty greatly helps the USA. In that vein honesty is the most important thing to provide and the strongest protections are there for being totally candid with the government. It does not matter that you represent yourself as a garbage man by profession but make millions in moving dope along. Or more simply put, being an illegal resident of the USA. None of any such disclosures can be used against you or to give law enforcement agencies a heads up to investigate you by candidly responding to the Census.
I know the detail of how the Census works and would advise Club Polk differently if what was stated above were not the case. The official folk within the Department of Commerce (where the Census Bureau resides within the US government) have TV ads on the air to this effect. These are genuine ads.
The detail of what you respond will only become publicly available 70 years from now. In fact, if you need to use the Census as proof for disclosure of some sort of personal detail in the future, like proving your age, it is fairly a difficult thing to do. Personal detail is kept that private. This happened a lot in the 1970s and 1980s as birth certificates were not uniformly kept for people born 62 or so years before ... and they were looking to collect social security, but needed to prove their age as being eligible.