The IRS has released Publication 600 which contains the optional sales tax tables that can be used by those who elect to deduct sales taxes rather than income taxes as an itemized deduction. The following link will allow you to download a copy of the publication:

http://www.irs.ustreas.gov/pub/irs-pdf/p600.pdf

While you are on line, you might want to jump to the end of the table. At the end of the table is a link that will allow you to download the tables as an Excel Spreadsheet.