1. A printing apparatus connected to a network, comprising: a storage configured to store an identifier list in which identifiers of layers for identifying accounting destinations to be charged for job execution are registered associated with the layers, respectively; an obtaining unit configured to obtain an identifier list from an external apparatus via the network; an updating unit configured to update the stored identifier list stored in the storage based on the obtained identifier list obtained by the obtaining unit in accordance with an update rule; and a display configured to display a setting screen for setting the update rule designating a layer whose identifier is used to update the stored identifier list when the stored identifier list is updated, wherein said updating unit updates the stored identifier list using the identifier contained in the obtained identifier list, the identifier used to update the obtained identifier list being designated by the update rule set in the setting screen displayed by said display.