This question can only be answered accurately if I (or we) knew how much you make, how often you're paid, and you're marital status. The IRS has a publication that you can look at that shows you how to compute what your tax liability will be based on those factors that I mentioned above. That publication is IRS Publication 15 (click here).
The more exemptions you claim on Form W-4, the less federal income tax is taken out of you paycheck. So, if you don't claim any exemptions, your employer will withhold more federal income taxes from your paychecks.