Should the census data form be filled out completely accurately....or should one fill it out without true data?
Don’t put down anything false - per Constitution = number of persons + sex + ages (not precise birthdates, names etc)
..however you can just write in “perfer not to answer” on every question and there is not anything they can do - ...other than call your house and demand answers and/or send someone to your house to demand answers (both of which they routinely do)