On December 27, 2022, the Treasury Department and the Internal Revenue Service (“IRS”) issued Notice 2023-7 (the “Notice”) describing proposed regulations Treasury intends to issue to address certain aspects relating to the application of a new corporate alternative minimum tax (“CAMT”)—a 15% tax on the adjusted financial statement income (“AFSI”) introduced by the Inflation Reduction Act and applicable to large corporations (so-called “applicable corporations”) for tax years beginning after December 31, 2022. Taxpayers are allowed to rely on the Notice until proposed regulations are issued, and the Notice provides welcome guidance on many critical issues as taxpayers evaluate the impact of the CAMT on their financial reporting and estimated tax payments for the first quarter of 2023.