26 USC § 6414
Income tax withheld
October 30, 2020
In the case of an overpayment of tax imposed by chapter 24, or by chapter 3 or 4, refund or credit shall be made to the employer or to the withholding agent, as the case may be, only to the extent that the amount of such overpayment was not deducted and withheld by the employer or withholding agent.
Amendments
2010—Pub. L. 111–147 inserted "or 4" after "chapter 3".
Effective Date of 2010 Amendment
Amendment by Pub. L. 111–147 applicable to payments made after Dec. 31, 2012, with certain exceptions, see section 501(d)(1), (2) of Pub. L. 111–147, set out as a note under section 1471 of this title.