Here is a link:
http://money.cnn.com/pf/101/lessons/18/page2.html
THe forst $7,000 will be taxed at 10%, the next $21,400 will be taxed at 15%, the remaining $1600 will be taxed at 25%.
You likely will also take advantage of the standard deduction, which should lower your taxable income by several thousand dollars. That places you squarely in the 15% tax bracket. You also have social security taxes to pay and your benefits.
I would also STRONGLY encourage you to copntribute to your 401k since it will reduce your taxes by 15 cents per dollar and give you a huge head start in life. Even if it is only $50/month it is a good habit to start now.
Look for your paychech to be about 75%-80% of what you earned. (Think of it as giving all of your money to the IRS until mid-March - it would cost you the same at the end of the year) Then thank heaven for tax cuts! Especially once you start earning more and have a family to support. Only a year ago the taxes started at 15% instead of 10%, and it was once much higher.