ONEOK Partners, L.P. (NYSE: OKS) is a publicly traded limited partnership. As such, unitholders are limited partners in ONEOK Partners as opposed to stockholders in a corporation. A partnership is not subject to federal or state income tax. Instead, each partner is required to report their allocable share of ONEOK Partners' items of taxable income, gain, deduction or loss on their individual income tax returns.

ONEOK Partners, L.P. determines taxable income annually and allocates it to each partner in accordance with their particular percentage interest in the partnership, without regard to the amount of cash distributions. Cash distributed during the year may be more or less than the amount of taxable income allocated. Generally cash distributions are considered a return of capital and reduce the tax basis of a limited partner's units.

Schedule K-1
The 2007 Schedule K-1 tax packages for ONEOK Partners, L.P. were mailed to unitholders on February 26, 2008.

ONEOK Partners, L.P. is required to furnish each unitholder with a tax package called a Schedule K-1 which describes the unitholder's respective share of ONEOK Partners' income, gain, loss and deductions for the tax year specified.

If you are a unitholder and did not receive a Schedule K-1 or if you have other questions regarding the information contained in your Schedule K-1, please call 1-800-371-2188 or visit the Schedule K-1 Web site.