The IRS 2013 tax tables contain tax brackets and tax amounts for all filing statuses and for any amount of taxable income. It provides a tax table for incomes of up to $100,000 and a tax computation worksheet for incomes over $100,000, as seen on the IRS website.
The first table lists the tax amounts for taxable incomes of $0 to $100,000 at regular intervals. There are entries for every $5 increment of taxable income in the beginning of the table. The increment increases gradually to settle at $50 after $3,000. There is one column corresponding to each of the four filing statuses, which are single, married filing jointly, married filing separately and head of household. If your income is $100,000 or less, simply read the amount indicated, and enter it on Form 1040, line 44, according to IRS instructions.
The computation worksheet consists of a section for each filing status, notes the IRS. Each section provides a table containing formulas for computing taxes on taxable incomes exceeding $100,000. A table is divided into four rows. In every row, the taxable income is multiplied by the tax rate factor for a bracket and for the filing status. An amount is subtracted from this product to obtain the tax to be entered on Form 1040, line 44.