Under the appropriate month, update the Actual field of the appropriate user. The field is a numerical field, so if you have a total Actual, overwrite the figure in the field, otherwise add the new value to the existing value Fig.2 (2). Click Save. Fig 2 (3). If the deal is split over multiple months, the value can be split over multiple months, navigate between months, clicking Save after each month.
If you are interested in making this an automatic process (e.g. updated daily), please contact YapCRM for more information.