ABSTRACTTax software is commonly used in the preparation of U.S. federal and state income tax returns. A common feature of tax return preparation software is the prepayment-position status bar, which automatically calculates an updated refund/tax-due position. This paper examines whether the prepayment-position status bar, influences taxpayer decision making. This study utilizes a 2 × 2 experimental design, manipulating the taxpayers' prepayment position (refund/tax-due) and manipulating whether the prepayment-position status bar is present or absent. Using experienced taxpayers as study participants, the results of the experiment show that taxpayers are more aggressive when they are in a tax-due position compared to a refund position and that this effect is exaggerated when the tax software contains a prepayment-position status bar.