What is the current federal income tax?

For the 2010 tax year the federal income tax rate on the individual taxpayer 1040 income tax return is 10% to the maximum 35% on the taxpayer TAXABLE INCOME AMOUNT after the 1040 income tax return is completed correctly to page 2 line 43 TAXABLE INCOME then the amount of income tax liability will be on line 44.

And that will be the amount before any credits or additional taxes that may be Due before you get to the bottom of page 2 where it will determine if you get any refund or owe any additional income tax that would be due when the return is sent to the IRS at the correct address.

Go to the IRS gov website and use the search box for 1040ES and go to page 8 for the TAX RATE SCHEDULE for your filing status.