What does IRS mean?
IRS is short for the United States Internal Revenue Service. The IRS requires individuals to file income tax returns every year using forms such as the 1040, 1040-EZ, or 1040-A.
The connection between the IRS and the FAFSA is that the FAFSA application asks for some of information from your tax return, such as adjusted gross income, number of exemptions, and income tax amount. For this reason, it's recommended that you find your most recent 1040, 1040-EZ, or 1040-A before starting a FAFSA application.
If you haven't yet filed your taxes, it is possible to estimate this information on your FAFSA. If you do estimate it, you should correct the FAFSA information you estimated as soon as you file your taxes.
To correct previously filed FAFSA information, visit https://fafsa.ed.gov/FAFSA/app/fafsa and log in with the student's first name, last name, Social Security Number, and date of birth, then click Make FAFSA Corrections. At that point, you will need to enter a Federal Student Aid ID number. If you don't already have an FSA ID, you can get one at https://fsaid.ed.gov.