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TOLL-FREE TELEPHONE SERVICE
You can call 1-800-829-1040 to get answers to your federal tax questions 24 hours a day.
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Form 3921 (Rev. April 2025)
For your protection, this form may show only the last four digits of your social security number (SSN), individual taxpayer identification number (ITIN), or
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How to know its the IRS | Internal Revenue Service
Jan 23, 2025 If the person doesnt show you these IDs or you arent sure about them, call the number on the card provided by the revenue officer or agent.
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