Question:

How do you add task comments in Vault PromoMats and Medical?

Answer:

Task Comments can be added when completing a task. Within the task completion dialog, click Add Comments.

Once the verdict and comments have been entered, select Complete. 

Task Comments have a maximum character limit of 500.

The comments appear in the Active Workflows view and are visible to all workflow participants. Once the workflow is complete, the Task Comments can be viewed from the Timeline view. 

Related Documentation:

Vault Help:  Accepting & Completing Document Workflow Tasks