Federal tax filing for individuals, businesses, international filers, nonprofits and government entities.
Personal taxes
- How to file: Step by step
- Amended return
- Tax rates and brackets
- Extension of time to file
- Due dates
- Mail a tax return
View tax records, make payments and more in your Individual online account
Businesses and self-employed
- Estimated taxes
- Employment taxes
- E-file information returns
- Employer identification number (EIN)
- All business tax information
View tax records, make payments and more in your Business tax account
Taxpayer identification number (TIN)
To file federal taxes, you need a taxpayer identification number (TIN). This may be a Social Security number (SSN), employer tax identification number (EIN), individual tax identification number (ITIN), taxpayer identification number for pending U.S. adoptions (ATIN) or a Preparer Taxpayer Identification Number (PTIN).
How long we can assess, collect and refund tax
Statutes of limitations are the time periods established by law when the IRS can review, analyze and resolve your tax-related issues. When the statutory period expires, we can no longer assess or collect additional tax, or allow you to claim a refund.