2020 Census: Changes Planned to Improve Data Quality, Report to Congressional Requesters [open pdf - 2MB]
From the Highlights: "The decennial census produces data vital to the nation. The data are used for congressional apportionment and redistricting; to allocate billions each year in federal funds; and to provide a social, demographic, and economic profile of the nation to guide policy decisions at all levels of government. Given census data's importance, it is incumbent upon the Bureau [U.S. Census Bureau] to ensure their quality. [...] GAO [Government Accountability Office] was asked to describe the Bureau's plans for the 2020 Census to resolve multiple, missing, incomplete, and conflicting responses. This report describes how, for 2020, the Bureau plans to (1) determine where to count people, including those in complex living situations, and how this differs from 2010; and (2) resolve multiple, missing, incomplete, and conflicting responses after data collection, and how this differs from 2010."
Government Accountability Office: https://www.gao.gov/