Form 1040-X. If you made a mistake on a 1040 you previously filed, you can make changes on Form 1040-X, Amended Return. Form 1040-SR. Those 65 and older can use this form.

The 1040-SS is for residents of American Samoa, the CNMI, Guam, Puerto Rico, or the U.S. Virgin Islands who have net self-employment income and do not have to file Form 1040 with the U.S. Form ...