Use 'report back' to show you have completed a task and are ready to share the results. I will report back with my findings on Monday.
Pro Tip 2/3
Expect Feedback
'Report back' implies that someone is waiting to hear about your progress or results. Please report back as soon as you have the survey results.
Pro Tip 3/3
Not a Dialogue
When you 'report back,' you provide information rather than having a back-and-forth conversation. After inspecting the premises, report back with your observations.