Where to mail 1120 form

The 1120 form!

The 1120 form is the annual income tax return for corporations, and it's typically due on the 15th day of the 4th month after the end of the corporation's tax year. For calendar-year corporations, this means the deadline is usually March 15th.

To mail your 1120 form, you'll need to send it to the correct address, which depends on your corporation's location and the type of return you're filing. Here are the general guidelines:

For corporations with a tax year ending December 31:

• If your corporation is located in an area served by the IRS's Western Area, mail your 1120 form to:
  • IRS Service Center, Fresno, CA 93888-0002
• If your corporation is located in an area served by the IRS's Western Area, but you're filing Form 1120-F (Foreign Corporation Income Tax Return), mail it to:
  • IRS Service Center, Austin, TX 73301-0002
• If your corporation is located in an area served by the IRS's Eastern Area, mail your 1120 form to:
  • IRS Service Center, Cincinnati, OH 45999-0002

For corporations with a tax year ending other than December 31:

• Mail your 1120 form to the IRS Service Center that corresponds to the state where your corporation is located. You can find the correct address on the IRS website or by contacting the IRS directly.

Additional tips:

• Make sure to sign and date your 1120 form before mailing it.
• Use the correct postage and ensure your return is properly sealed and addressed.
• Keep a copy of your 1120 form and supporting documents for your records.
• If you're filing electronically, you can submit your return through the IRS's Electronic Filing System (e-file) or through a tax preparation software.

Remember to check the IRS website or consult with a tax professional if you have any questions or concerns about filing your 1120 form.