Hi @cma1 - I added some text mode starting points below, hope this helps!
Project Level Report
**Disclaimer: The below text mode assumes the name of the task is "Go Live" and doesn't include a contains statement. I don't know from this documentation if a contains is possible on an IF statement, but maybe someone else from the community page can provide input. This might help you get started though!
displayname=Final Deliverable Due Date
listdelimiter=<div>
listmethod=nested(tasks).lists
textmode=true
type=iterate
valueexpression=IF({name}="Go Live",CONCAT("",{plannedCompletionDate}),"")
valueformat=HTML
Task Level Report
Note: I copied the text mode for this, but you can really just go Advanced Options > Add a Rule on this Column on a Planned Complete Date column and change the back-end to Task > Name contains Go Live
valuefield=plannedCompletionDate
querysort=plannedCompletionDate
valueformat=atDate
displayname=Final Deliverable Due Date
linkedname=direct
namekey=plannedCompletionDate
styledef.case.0.comparison.leftmethod=name
styledef.case.0.comparison.lefttext=name
styledef.case.0.comparison.righttext=Go Live
styledef.case.0.comparison.operator=cicontains
styledef.case.0.comparison.operatortype=string
styledef.case.0.comparison.icon=false
styledef.case.0.comparison.truetext=