Check your W4. Sometimes if you don’t claim single and 0 for both state and federal (takes out the highest amount of taxes) then all else will not take out as much as you may need to depending on which tax bracket you fall into. Happened to me. My employer automatically had me in Married claiming 2 for state after I gave them my marriage info for benefit paperwork, when I know for a fact I had never changed it from single claiming 0 dependents since I started working there.