Only if you're a resident in Germany, But if I live somewhere in the EU and sell something to someone living in Germany I don't owe income tax to the German government.
I pay my income tax where I'm a fiscal resident (Estonia, Romania, etc.)
Lucky you in this case, not having to learn and deal with all this then :)
But the original comment was about someone living in Germany (at least at the time)
Only if you're a resident in Germany, But if I live somewhere in the EU and sell something to someone living in Germany I don't owe income tax to the German government.
I pay my income tax where I'm a fiscal resident (Estonia, Romania, etc.)