Do I tell Centrelink that DH is studying?

[Liviam]

You need to notify Centrelink/Family assistance office of all changes in your circumstances plus it's better safe than sorry.

[briggsy's girl]

It depends on whether you are receiving ftb only, or ftb plus income support. If ftb only, you only need to notify of change to income estimate and whether his hours of study/work combined change above it below 15 hours per week. If income support as well, definitely notify