Decision letter.
(2) Decision letter. At the conclusion of the process described in paragraph (b)(1) of this section, and when there is a final determination of tax, as defined in 301.7623-4(d)(2), the Whistleblower Office will pay an award under section 7623(a) and 301.7623-1 through 301.7623-4. The Whistleblower Office will communicate the amount of the award to the whistleblower in a decision letter.