<prompt> Human: Im hoping somebody here can either point out a mistake Ive made while doing our taxes or at least explain to me how this can happen.When I was single I liked to keep my federal withholding exemptions high to keep more of my money each paycheck. I used this money to save and invest all year, knowing I would be getting a big tax bill. I am used to owing 3k each year.Ive been married for 6 years now and my wife has never liked this strategy of mine. Ive earned more money over the years and never adjusted my federal exemptions but my wife has always left her W-4 at 0. Between me paying too little, her paying too much and the various tax benefits of being married and having a mortgage weve maintained a tax bill right around the 3k mark for the last 6 years.This year I finally relented and adjusted my W-4 down to 0. In all honesty we havent been as diligent together in doing wise things with the extra money I keep on my paycheck each month by having several federal exemptions as I was able to do when I single for the last couple of years, so I didnt mind letting the government force us to save a little more this year.However, when I sat down to do our taxes yesterday I was shocked when TurboTax told me would owe nearly 5k. We had no major life changes in 2014. We own the same house we always have, we lived in the same non income tax state all year that we always have, our return on investments was what it generally is, etc.For what its worth, I made 97k in 2014 and my wife made 52k. Thats a little more than I made last year but not drastically more. We each had our W-4 exemptions set to 0. Weve always filed Married Filing Jointly.I know I can reduce our tax bill a little still. I havent entered a few charitable contributions we made last year yet, but I wont be able to get it below 4,500. We are fortunate to be in a situation where this is just a bummer and not a financial crisis for our family, but I really dont understand how this situation is even possible.How can I have given the government more of our money each month than ever before and have a much higher tax bill than ever before, all other life situations being roughly equal?Help!  <response>: As usual with these posts, you need to compare the tax liability for the two years.Last year 2013: how much income? What was your tax liability? What was your total tax withheld?This year 2014: how much income? What was your tax liability? What was your total tax withheld? 