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How to Change Your Tax Withholding
Use our withholding calculator to avoid having too much or too little federal income tax withheld from your paycheck.
Fix a Mistake on Your Tax Return
If you discover an error after filing your return, you may need to amend your return.
How to Notify the IRS of an Address Change
If your address has changed, be sure to notify the IRS to ensure that you receive any refunds or correspondence.
What to Do If You Receive an IRS Notice or Letter
Each year, millions of notices are mailed to taxpayers. Here's what you should do if you receive one.
Affordable Care Act
Learn how the health care law will affect the way you'll file your taxes.
Know Your Rights as a Taxpayer
Explore your rights and our obligations to protect them.
IRS Mailing Addresses for Paper Tax Returns
Use the “Where to File” pages to find the mailing address you’ll need in order to file your paper tax return.