Achievement Date

If you're talking about the ZPROG, you can't set the completion status to 2 until the EPA has also been completed and therefore the achievement date will be known:

In order to be recorded as ‘Completed’ (Completion status code 2), both the training and end point assessment activities for the programme must be completed. An end point assessment that has resulted in a failed outcome can be classed as complete as long as the learner reaches the end of the end point assessment period, rather than withdrawing. If either of these have not been completed, then the programme aim cannot be recorded with Completion status code 2.

If the practical period is complete you'll need to leave the completion status as 1-continuing and set the outcome to 8-learning activities are complete but the outcome is not yet known.

See more detailed guidance here.

Perfect Thank you Ben ! 

That works now