Form 1120
Fill Form

Form 1120

2025
Official IRS form
Official IRS form
Trusted by businesses
Trusted by businesses
Filled annually
Filled annually

Form 1120 is used by corporations for reporting tax items and calculating the federal income tax owed to the IRS.

Get a fillable tax form to report income, gains, losses, deductions, and credits for your corporation. Our 1120 Form download makes it simple for you to fill out and file your corporate tax return each year.

Form Year

Form 1120

2025
Form 1120
Fill Form
Form Year
Official IRS form
Official IRS form
Trusted by businesses
Trusted by businesses
Filled annually
Filled annually

Form 1120 is used by corporations for reporting tax items and calculating the federal income tax owed to the IRS.

Get a fillable tax form to report income, gains, losses, deductions, and credits for your corporation. Our 1120 Form download makes it simple for you to fill out and file your corporate tax return each year.

How to Fill Out a 1120 Form?

Step 1: Gather your financial records and prior-year returns.

Step 2: Open the 1120 fillable form on pdf.net and enter your corporation’s information.

Step 3: Report your income, gains, losses, deductions, and credits accurately.

Step 4: Compute total tax using the schedules that apply to your corporation.

Step 5: Review all the entries and sign the form.

Step 6: Save and submit your Form 1120 electronically or by mail filing.

What Is a Form 1120?

A Form 1120, also known as the U.S. Corporation Income Tax Return, is used by domestic corporations for reporting income, gains, losses, deductions, and credits. They can also figure out their income tax liability with this PDF tax form.

Who Is Required to Fill Out Form 1120?

Every domestic corporation must file Form 1120, even if it has no taxable income. This includes corporations in bankruptcy and those not actively conducting business.

When Is Form 1120 Due for Submission?

Form 1120 is due for submission on the 15th day of the fourth month after the end of its tax year. Those with a short year ending in June must file by the 15th day of the third month.

What Are the Penalties for Not Submitting the Form?

The penalty for not submitting the form is 5% of unpaid tax per month, up to 25%, with a minimum of $510 if over 60 days late. Late payment adds 0.5% per month, and interest applies unless reasonable cause is shown.

Where Do I File the 1120 Form?

You can file electronically using the IRS e-file system or by mail. If filing by mail, check the Form 1120 instructions for the correct address; it depends on your corporation's principal business location and whether payment is included.

How to Get Your 1120 Form?

  1. Open the editable 1120 Form
    Open the editable 1120 Form
    1

    Open the editable 1120 Form

  2. Fill in your details
    Fill in your details
    2

    Fill in your details

  3. Download the completed form
    Download the completed form
    3

    Download the completed form

#1. How do I get a blank Form 1120?

You can get a blank 1120 Form from our PDF Tax Forms hub page. When you click on it, it will open in our PDF editor with a full suite of tools. Then, you can fill out all the fields and download a ready-to-file copy.

#2. How often is the Form 1120 filed?

Form 1120 is filed once a year, after the corporation's tax year ends. It is due by the 15th day of the fourth month, unless it is a short year ending in June. Then, the deadline is the 15th day of the third month.

#3. Where to file a 1120 Form?

You can file your IRS Form 1120 PDF electronically through the IRS e-file system or by mail. The former is mandatory for corporations that file ten or more returns of any type in a calendar year. If you don’t fall under this category and would prefer to file by mail, the address is specified in the Form 1120 instructions.

#4. What if my 1120 Form is missing information?

If your file is missing information, you can reopen a 1120 fillable form on our PDF editor and fill in the necessary fields. To make sure you complete everything correctly, cross-check with a 1120 Form example; afterwards, simply download the file for submission.

#5. Can I fill out my 1120 Form online?

Yes, you can fill out your 1120 Form online with pdf.net. Our PDF editor makes it easy to type into fillable fields and download a ready-to-file copy upon completion.

#6. Is this form free?

Our editable 1120 Form is free to access and edit. However, to download it to your device, you will need to purchase a subscription plan: $1.45 for limited 7-day access, $1.95 for full 7-day access, or $19.95 monthly for annual access.

#7. Can I correct mistakes on Form 1120?

Yes, you can correct mistakes on your Form 1120 by filing an Amended U.S. Corporation Income Tax Return using Form 1120-X. To make sure you don’t make additional errors, review the Form 1120 instructions carefully.