Does anyone have this ETF on Flatex?

I recently created a savings plan for it and currently only 200 invested. Last week then came the message about a reinvestment and tax posting of € 36.45.

I am aware that these amounts are taxed. I find almost 20% of the value but still a bit much.

Is this normal and can I now expect every quarter with 20% extra costs? 😅

Sorry if this is a stupid question, I haven't been around very long.