This technical note provides additional information to complement two recent working papers that use SAMOD, a tax-benefit microsimulation model for South Africa. The first paper focuses on the quality of the income data in SAMOD’s underpinning datasets for the purpose of simulating personal income tax (PIT) (Wright et al. 2018). The second working paper explores the quality of income data in household surveys from Tanzania and Zambia and applies one of the income imputation techniques to a South African dataset (McLennan et al. forthcoming).