I made double the income as last year but im getting less back in taxes this year?

So last year I made $12,000 in income from my job and this year i am working at the same job and have made $24,000 in income so why is it that when I went to do my taxes this year I'm getting back less then I did last year by a few hundred? Also is this normal to be getting back less when you make more?

Nothing in my taxes has changed from last year besides me making more money everything else has stayed the same. I am a single filer by the way.