Or do you mean your tax return refund is less this year?  

If your actual W2 is less, did you contribute to something like a 401k plan?  Any box on your W2 for the difference?  You usually don't make exactly the same income each year.

Yes I meant my tax return is less this year than last year. I made less last year & this year I made alil more but my refund is smaller than last year. I'm gonna ask the company I work for why it's less this year than last year cause I don't understand why it would be

We have a progressive tax system. That means that the more you earn, the higher tax rate you pay on each additional dollar of income. If you got paid more last year than the year before but you did not increase your withholding, then your refund would be less.

Yes that's common.  More income = more tax = less refund.  And with more income you might not be getting as many credits like the EIC as the year before.  Compare this return with your 2015 return line by line and see what changed.

Thank you both for your help! I speaked with my employer & got it figured out.