When you tap the Costs icon to add Labor, you also have the option to mark the Task as finished.
Tap the Finish Task button on the window or the Save & Finish
button on any of the Cost entry windows. Either button opens the Finish Task window.
Scroll down to add needed details.
NOTE: If you have saved costs from the related windows and tap the Finish Task button, the Finish Task window includes all the related costs.