Hi All,
I am German Citizen and I have worked as a contractor in Germany from Jan to April this year. Also paid the Tax and MwSt to the German Tax office.
After that I don't have any income in Germany. I am still registered in Germany...but will do a Deregistration before I start working in Switzerland.

I will start working and living in Zurich from August and will also pay my taxes here.
I know that there is a Double Taxation Treaty but have some doubts:

1. Do I have to inform the German Tax office that I am moving to Switzerland?

2 Do I have to inform the Swiss Tax office that I had some income in Germany this year (For which I have already paid taxes in Germany)?

Has anyone gone through the same Situation?
Thanks for your help...