Query Designer - Trying to create a report to show the last update/action

I have created an attribute and calculation field so if an end user phones the Service Desk to chase exisiting call we have an action of chased call which analysts can click and this will increment the a field by 1 each time it is chased.  What I would like to do is be able to create a query or work list to show calss where the last update or action is chased call