The term 1040 INFORMATION is related to INCOME and can be solved by the crossword solution INCOME, which is a six-letter word. The 1040 form is an Internal Revenue Service (IRS) form used to report an individual's annual INCOME. It is also known as the U.S. Individual INCOME Tax Return and is used to calculate taxes owed to the federal government. The information provided on the 1040 form includes wages, salaries, tips, and other forms of INCOME.