Over here it seems to be this during that year:
Withholding percent -> Earnings limit in euros.
0.0% -> 0 to 1,420 euros
11.0 -> over 1,420 to 13,700 euros.
40.0% -> over 13,700 euros.
Then there is a solid percent for few allowances just like my labor market support was. If you don't give your tax deduction card to your employer who takes the tax off from your salary he has to do it with 60.0%.
Honestly, I'm not very smart with taxes because I haven't got taxable incomes or allowances a lot during my 19 living years. I had a short summer job in the last summer and I got something around 230 euros and I had to pay something. I'm not sure if that was a tax or pension contribution or something.
Luckily there's always mommy and daddy who can advise me