Taxpayers can find IRS tax tables for 2013 at efile.com. Taxpayers need their incomes and filing statuses in order to use the tax table to determine the amount of tax due. The efile.com site also provides a link to a more detailed tax calculator.
The 2013 IRS tax tables are also available at IRS.gov, the official website of the Internal Revenue Service. To find the table, taxpayers should search under the Forms & Pubs column, and then click on the Prior Years link. Tax tables are provided in the instruction publications for income tax forms. Tax tables change from year to year, notes Investopedia.