Period Covered

File the 2025 return for calendar year 2025 and fiscal years that begin in 2025 and end in 2026. For a fiscal or short tax year return, fill in the tax year space at the top of the form.

The 2025 Form 1120-F may also be used if:

• The corporation has a tax year of less than 12 months that begins and ends in 2026, and

• The 2026 Form 1120-F is not available at the time the corporation is required to file its return.

The corporation must show its 2026 tax year on the 2026 Form 1120-F and take into account any tax law changes that are effective for tax years beginning after December 31, 2025.

Note: A return for a short year beginning and ending in 2025 should not be filed before the earlier of its extended due date or January 15, 2026.