Legal Questions About Tax Returns

Questioner

I'm getting married in 2017. We've been living together since 2016. In early 2016, before we lived together, I earned about 100 euros with something besides my regular job. Can my girlfriend find out about this when we file our income tax return? In previous years I earned somewhat larger amounts and also reported this properly and therefore paid tax on it. In 2016 it would be 100 euros. I also stopped (no, not prostitution or anything).

Lawyer

If you specify it, it will of course be stated and questions can be asked about it.