Apparantly you can receive up to 840€ per year tax free for it?

No. From the money you receive for your volunteer activities you can get that money tax-free up to 840 Euros. I have not gotten a single cent for my activities, so I have gotten exactly zero benefit from my Ehrenamt in that regard.

	▲	FinnKuhn 6 minutes ago \| parent [-]
		Open Source contributers often have a way to send them money. I assumed that this would then qualify for this tax excemption?