I'm working in Germany and I do have a Tax Number.
Recently I found a mobile app that allows me to do small jobs (for a couple of EUR) by making pictures of things that are of interest for the client.
Now I want to receive the money I have earned but it asks me to tell them if I'm a private individual or a small company.
I believe that the first case is right for me.
Now my question:
Is "private individual" the right case here or "the contractor" is better (and why)?
Extra points for explaining how to put this into tax declaration.