To export a vehicles history, click on Vehicles (1) on the left-hand side of the screen or alternatively, click Maintenance (2) then Vehicles (3):
Select the vehicle you wish to export the maintenance history of. From the tabs on the top of the edit vehicle screen, click on History (1), then click either History (Detail) (2) or History (Summary) (3):
History (Detail) will provide an overview of all maintenance history for the specified vehicle while History (Summary) will provide an overview of maintenance history within a specified period. This period is either 3, 6 or 12 months, you can also export all history.