Notice 2021-63, page 835.

This notice provides guidance regarding the temporary 100-percent deduction for expenses that are paid or incurred after December 31, 2020, and before January 1, 2023, for food or beverages provided by a restaurant for purposes of § 274(n)(2)(D) of the Internal Revenue Code. In particular, the notice sets forth a special rule that allows a taxpayer that properly applies the rules of Rev. Proc. 2019-48 to treat the meal portion of a per diem rate or allowance as being attributable to food or beverages provided by a restaurant.