This report describes the design, methods, and results of the 2016/20 Baccalaureate and Beyond Longitudinal Study (B&B:16/20) conducted by the U.S. Department of Education's National Center for Education Statistics (NCES). It is the second follow-up with a cohort of bachelor's degree recipients originally identified during the 2015-16 National Postsecondary Student Aid Study (NPSAS:16). The data collected in B&B:16/20 are intended to provide researchers and policymakers with key information on student debt and repayment as well as postbaccalaureate enrollment and employment outcomes 4 years after completion of a bachelor's degree with a special focus on the experiences of elementary and secondary teachers. This data file documentation details the methods used to collect, process, and analyze these data, and it also provides users with guidance on how to analyze these nationally representative data.