How much income tax is due on an income of 61,000?

My husband took a new job with a much lower salary this year. His income is 50,000, payable bi-monthly. He started the job at the end of January. I have income from Social Security disability in the amount of 11,40.00 per year. We are trying to figure out how many exemptions to claim in order to not owe the IRS for the year. I can't seem to come up with the amount of tax we will owe for 2010. Any help would be appreciated. Thanks!