Provided are devices and methods for retroactively changing time sheets. In one example, the method includes detecting a change to an attribute associated with a time sheet stored in a database, splitting the time sheet into a first portion of time before the attribute changed and a second portion of time after the attribute changed, retroactively applying the change of the attribute to the second portion of time and preserving the attribute for the first portion of time to generate modified time sheet data, and updating the time sheet stored in the database based on the modified time sheet data to implement the retroactively applied change. Accordingly, the system described herein may automatically identify and process retroactive changes to a time sheet that has already been submitted and stored in a database.