On December 27, 2022, the IRS released initial guidance on the stock buyback excise tax (“Excise Tax”) enacted as part of the Inflation Reduction Act in August 2022, as discussed in our prior Alert. Notice 2023-2 (the “Notice”) provides interim guidance on which taxpayers may rely pending issuance of regulations, and addresses several ambiguities in the application of the Excise Tax. This Alert discusses the impact of this interim guidance on special purpose acquisition company (“SPAC”) operations and transactions.