Form 1040X Form 1040X Form 1040X Form 1040X Form 1040X Form 1040X Form 1040X, Amended U.S. Individual Income Tax Return Form 1040X Form 1040X Form 1040X instructions Form 1040X Form 1040X Form 1040X Form 1040X Form 1040X Forms 1040X 1040X instructions Formulario 1040X Form 1040X 1040X form 1040x