2020 census online.The U.S. Census 2020 will be the first primarily digital census, providing a third-way people can respond to the questionnaire outside of by phone or mail.[2020 CENSUS: Click here to fill it out online]In mid-March, households will start receiving official Census Bureau mail with detailed information on how to respond to the survey but the census officials expect to roll out the online option March 12.The Census Bureau expects more households to respond to the questionnaire as the world becomes more technology-driven and hopes this provides a better population count.[WATCH BELOW: How to complete the census online]To record responses online, the bureau will mail letters to households with specific directions detailing how.