Internal Revenue Service (IRS) Announcement 2010-9 requires large corporate taxpayers to disclose significant and detailed additional information regarding tax uncertainties pursuant to FIN 48.

TaxNewsFlash 2010-43 highlights the proposed disclosure requirements, including the potential impact of the requirements on an organization's operations, investment decisions, and tax accounting and reporting processes.

Though the IRS indicates that it will retain its current tax accrual workpaper policy of restraint, the practical effect of the new provisions would be to require routine disclosure of information that goes beyond that which the IRS has historically sought except under the relatively rare circumstances in which it formally requests workpapers during an examination.