IRS Not Required, as a Matter of Law, to Adjust Each Subsidiary's Income or Break Down Adjustment in Detail in Making §482 Adjustment
The question of how much detail the IRS must provide in making an adjustment under IRC §482 was the issue decided by the Tax Court in the case of Guidant, LLC v. Commissioner, 146 TC No. 5.
IRC §482 is meant to deal with cases where taxpayers may be tempted to use transactions between related entities to manipulate a tax result by having the transactions take place under terms that are markedly different than would result from a true arms-length transaction between unrelated parties.
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