A data transmission apparatus that transmits data and receive at least a destination of the data from an external apparatus includes a reader that reads an image of an original, a network interface that transmits image data of the read image, a display that displays a setting screen including a display field for at least the destination of the data, a receiver that receives the destination data displayed in the display field from the external apparatus, and a controller that performs control such that the display is turned on based on receipt of the destination and that the setting screen where the destination is input in the display field is displayed.