Projects → Task Plan → Dialog Boxes → Task Information → Task Information, Advanced → Editing a task's deadline
If you have set a deadline for a task, but the schedule later slips out past that deadline (creating negative slack), you should change the deadline (or remove it) so that the negative slack is removed. A task with negative slack that is also on the critical path may require adjustments to more than just the task that has slipped out past its deadline.
To edit the deadline for a task
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