

If you didn't save the council, they will refuse to meet you. If you saved the council in the previous game, there is a meeting underway.

You will be met at the Human Embassy by Captain Anderson. Head to the Citadel, and travel to the Presidium. When you take command of the new Normandy after the events of Freedom's Progress, you receive a message from Captain Anderson that differs depending on the fate of the council at the end of Mass Effect. Not to be confused with Assignments, in Mass Effect 2 there are a few Optional Missions and most of them revolve around choices in the first game. Optional Missions are secondary quests in Mass Effect 2, that are not mandatory to progress the game's story, but provide context and flavor by meeting interesting NPCs of all kind of Races, granting additional experience, and letting the player visit extraordinary and unique planets. Citadel: The Council is an Optional Mission in Mass Effect 2.
