What’s New

New Item C. Item C was added to Form 4626. See the instructions for Item C.

Interim simplified method. New optional interim simplified method for determining applicable corporation status provides a higher safe harbor threshold. If met, the corporation is not required to complete Form 4626. See Simplified Methods for Determining Applicable Corporation Status and new Interim Simplified Method (Safe Harbor) Calculation Worksheet.

Interim guidance for determining adjusted financial statement income (AFSI) with respect to partner- ships. Notice 2025-28 provides interim guidance simplifying the application of the Corporate Alternative Minimum Tax (CAMT) to partnerships and CAMT entity partners. For more information, see Notice 2025-28, 2025-34 I.R.B. 316, available at IRS.gov/irb/ 2025-34_IRB#NOT-2025-28 .

Interim guidance on the application of the CAMT to domestic corporate transactions, financially troubled companies, tax consolidated groups, and acquired fi- nancial statement net operating losses and certain built-in items. Notice 2025-46 provides interim guidance to simplify the application of the CAMT to domestic corporations. For more information, see Notice 2025-46, 2025-43 I.R.B. 533, available at IRS.gov/irb/ 2025-43_IRB#NOT-2025-46 .

Interim guidance on the application of the CAMT un- der sections 55, 56A, and 59. Notice 2025-49 provides rules for certain adjustments to AFSI and rules for proposed applicability dates and reliance on the CAMT proposed regulations (described later). For more information, see Notice 2025-49, 2025-44 I.R.B. 627, available at IRS.gov/irb/2025-44_IRB#NOT-2025-49 .