I want to understand why I owe taxes this year if the only thing that change was another job? I get paid less there and added up I still only work a complete 30-39 hours.

1. My taxes and everything still get withheld and taken out of all my checks 2. I did claim people this year but I have the last 2/3 Years 3. Like mentioned, I make less at this job and is technically an extension of my main job (line cook) I just have to be under their payroll since I’m at their location 4. I don’t work extra hours or anything over 40/42 hours a week for the most part unless we’re understaffed so my combined work hours will always be 36-40 hours Did I do something wrong in my tax form or was there some kind of mistake made?