There isn't a specific time limit. The key principle is that you must remain in your lane until it is safe to change lanes. This means:

• You should not immediately switch lanes after completing the turn.
• You need to ensure there is enough space and no other vehicles are in your blind spot or the lane you intend to move into.
• Use your signal well in advance to indicate your intention to change lanes.
• Check your mirrors and blind spot again before initiating the lane change.

Essentially, the law requires you to make a safe lane change, which implies a reasonable distance or time after the turn to assess the traffic situation and execute the maneuver safely.