https://2020census.gov/en/about-questions.html They ask names of all the people residing at your residence, relationship to the primary responder, race, and Hispanic origin or not. They also ask what type of home your dwelling is: house, apartment, mobile home, cardboard box, etc. They also ask for a phone number.
They ask each persons name, sex, date of birth, race and relationship to the primary responder.
I found that if you skip something, it will not move forward once. Hit the next button again, you can skip some blanks (phone number was one). Not sure what all it will allow you to skip.