Citadel: The Council

One of the first missions Commander Shepard receives, right after he has found evidence that the collectors appear to be the force behind all recent abductions of entire human colonies in the Terminus Systems, consists in going to the Citadel, in order to try convincing the Galactic Council to support Shepard's efforts to further investigate and end the threat.

To complete the quest simply go to the Presidium and talk to Captain Anderson. He will also return your Spectre status on behalf of the Council.