Receive mail and packages without revealing your address or place of residence?

Hello everyone, I'll start with an example: Person X is a public figure, a self-employed influencer/content creator, for example. Their "fans" would love to send gifts and letters. However, Person X doesn't want to reveal their address or even their place of residence, so a traditional parcel station or post office box is out of…

Fill out the tax assessment for your side business as a streamer/content creator yourself?

I file my own annual tax returns for my main job. This year, I had to register a side business because my monthly income from Twitch was over €450. The question is, does anyone of you do this yourself and can tell me a few things they mention? Like the power I might need or…