Information For...

For you and your family
Standard mileage and other information

Forms and Instructions

Individual Tax Return
Instructions for Form 1040
Request for Taxpayer Identification Number (TIN) and Certification
Request for Transcript of Tax Return


Employee's Withholding Allowance Certificate
Employer's Quarterly Federal Tax Return
Employers engaged in a trade or business who pay compensation
Installment Agreement Request

Popular For Tax Pros

Amend/Fix Return
Apply for Power of Attorney
Apply for an ITIN
Rules Governing Practice before IRS

Definition of Adjusted Gross Income

 Adjusted Gross Income

Adjusted Gross Income (AGI) is defined as gross income minus adjustments to income. We suggest you refer to your 2018 federal income tax return to get a quick estimate of your 2018 AGI. On your 2018 return, please refer to:

  • Line 4 if you filed a Form 1040EZ.
  • Line 21 if you filed a Form 1040A.
  • Line 37 if you filed a Form 1040.

If you are filing using the Married Filing Jointly filing status, the $66,000 AGI limitation applies to the AGI for both of you combined. This AGI will appear on your return.

To e-file your federal tax return, you must verify your identity with your AGI or your self-select PIN from your 2018 tax return.