United StatesGuideNo. 1040
1040 — U.S. Individual Income Tax Return
The annual federal income tax return for individuals in the United States.
TaxView guide
Internal Revenue Service (IRS)TaxGuide
W-4 — Employee's Withholding Certificate
Given to your employer so they can work out how much federal income tax to withhold from your pay.
The form is downloaded and submitted on the authority's website.
What this form is for
Tell your employer about your filing status, other income and deductions so the right amount of federal tax is withheld.
Documents to have ready
- Your Social Security number
- Your other income and your spouse's, if you file jointly
Where to send it
You give the W-4 to your employer, not to the IRS. Fill out a new one when your situation changes.
Our tips
- Always download the latest version from the official site: federal forms are updated regularly.
- Read the official instructions that come with the form before you start.
- Keep a copy of everything you send, with the date you sent it.
The information on this page is general. If in doubt, the official source prevails.
Related forms
- United StatesGuideNo. I-9
I-9 — Employment Eligibility Verification
Completed at hiring by the employee and employer to verify identity and the right to work in the US.
EmploymentView guide