Some taxpayers have to attach additional forms to the 1040. For example, sole proprietors who have self-employment income to report must complete a Schedule C form to declare the income (or loss ...
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 ...