The IRS has published guidance concluding that the claimed tax benefits of various abusive tax shelters should be disallowed. The guidance is the conclusion of the IRS on how the law is applied to a particular set of facts. Guidance is published in the Internal Revenue Bulletin for taxpayers’ information and also for use by IRS officials. So, if your return is examined and an abusive tax shelter is identified and challenged, published guidance dealing with that type of shelter, which disallows certain claimed tax shelter benefits, could serve as the basis for the examining official’s challenge of the tax benefits you claimed. In such a case, the examiner will not compromise even if you or your representative believes you have authority for the positions taken on your tax return.