Dear Mr. Drew,
That depends on the current status which is started, tested, merged, activated, completed, closed of your implementation project.
In simple terms, if you were able to edit the implementation project then scope it and finish the scoping. This should be available for you in approval process view of application and user management.
If you were not able to edit and you are already went live, then you will have to create a change project, scope this and finish scoping.
Regards
Leo