I know this. I figured my taxes the same this year as I did last year (1040EZ, the "let's get this over with" filing form). I give myself an extra deduction so I usually have some tax to pay in April, even after payroll deductions are factored in.
Last year, I had to send the IRS a check around $180. This year, I'll have to send them a check for $380. I earn less than $40,000 a year so I'm certainly not in any economist's classification of "the rich" or "the top 5%", etc.
Proof (to me anyway) that Obama's "middle class tax cut" is a total lie. But, then, I always knew it was.
You owe more because the withholding was reduced in 2009. Be sure to take your Making Work Credit; should be $400.
Look hard