This report presents the results of a large-scale field experiment that the tax preparation company H&R Block (the Company) conducted in collaboration with the Consumer Financial Protection Bureau (the CFPB). The field experiment investigated whether customers could be encouraged, through consumer communications with and without the offer of a small financial incentive, to use a savings feature on a prepaid card to save a portion of their tax refunds from all sources, including state and federal refunds. The CFPB was particularly interested in whether consumers who receive the Earned Income Tax Credit (EITC) would be receptive to messages about saving.