When Calculating Earned Income Credit, does housing allowance count toward income?

I have used turbo tax the last 3 years and my income nor any other thing has changed significantly in that time. However my return is much larger this year and it is because the Earned Income Credit is much more. It seems to not be adding in my housing allowance as income on top of my wages but I looked back to my 2016 returns and I am doing everything the exact way I did last year so not sure why the earned income credit is so much more then last year. Not complaining but something must be wrong but not sure what to do.