Form 1120-X, Amended U.S. Corporation Income Tax Return

Corporations use this form to:

Form 1120-X

All Revisions for Form 1120-X

• correct a Form 1120 (or Form 1120-A, if applicable) as originally filed, or as later adjusted by an amended return, a claim for refund, or an examination,  or 
• make certain elections after the prescribed deadline.