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IRS Form 1139 – Fillable PDF

  1. Country USA
  2. Language English
  3. Activity Taxes
  4. Department Internal Revenue Service
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IRS Form 1139 – Fillable PDF

IRS Form 1139, Computation of Decrease in Tax, is used by corporations that have a net operating loss (NOL) carryback or other tax benefit that reduces the tax liability for a prior year. Filling out this form accurately can result in a significant refund.

What Is IRS Form 1139?

Form 1139 calculates the amount of tax reduction a corporation can claim for a previous tax year. It is typically filed with the original return or an amended return for the year being reduced.

How to Complete Form 1139 Online

With Formize’s fillable PDF, you can complete the form directly in your browser—no need for a separate PDF editor. Follow the simple steps in the How‑To section below.

Common Mistakes to Avoid

  • Entering the wrong tax year—double‑check the year you are reducing.
  • Mis‑calculating the NOL amount—use the worksheet attached to the form.
  • Leaving required fields blank—Formize will highlight missing data before you submit.

Download the Fillable PDF

Click the Fill out this form button on this page to launch the Formize PDF Filler. The fillable version of Form 1139 will load automatically.

Where to Get Help

If you need assistance, consult the IRS instructions that accompany Form 1139 or speak with a qualified tax professional. The Formize platform also provides tooltips for each field to guide you through the process.

Instructions

FAQ
  • What is the purpose of IRS Form 1139?

    Form 1139 is used to calculate a corporation’s reduction in tax liability for a prior year, typically due to a net operating loss carryback.

  • Can I file Form 1139 electronically?

    Yes. After completing the fillable PDF with Formize, you can save the file and submit it electronically through the IRS e‑file system or attach it to an electronic return.

  • Do I need a tax professional to fill out Form 1139?

    While a professional can help with complex calculations, the Formize filler provides step‑by‑step guidance and tooltips, making it possible to complete the form yourself.

  • Is there a deadline for filing Form 1139?

    Form 1139 must be filed with the original or amended return for the year you are reducing. Generally, this follows the regular corporate tax filing deadline, including extensions.

  • What if I make a mistake after submitting?

    If an error is discovered, file an amended return (Form 1120‑X) and include a corrected Form 1139.

  • Is the PDF download free?

    Yes. The fillable PDF for Form 1139 is provided at no cost via the Formize platform.

HOW TO

How to fill out Form 1139 for free, online in 5 easy steps:

  1. 1
    Click the Fill‑out Button
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  2. 2
    Wait for the Filler to Load
    The app loads the fillable version of Form 1139. This usually takes a few seconds.
  3. 3
    Enter Your Information
    Fill each highlighted field with the required data. Tooltips provide guidance for each line.
  4. 4
    Validate and Review
    Click the "Validate" button. Formize will flag any missing or inconsistent entries.
  5. 5
    Save or Submit
    When all fields are complete, download the finished PDF or print it for mailing to the IRS.
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ABOUT

Tax forms

Form 1139 is one of Tax forms that are documents used to report information about an individual's or business's income, deductions, and tax liability to the relevant tax authority. These forms are necessary to comply with tax laws and fulfill tax obligations. Tax forms vary depending on the country and the specific tax requirements in place. Here are some common types of tax forms:

Individual Tax Forms: These forms are used by individual taxpayers to report their personal income and claim deductions, credits, and exemptions. Examples include the 1040 form in the United States or the Self-Assessment Tax Return form in the United Kingdom.

Business Tax Forms: Business tax forms are used by companies, partnerships, or self-employed individuals to report their business income, expenses, and other tax-related information. Examples include the Schedule C form (Profit or Loss from Business) in the United States or the CT600 form (Company Tax Return) in the United Kingdom.

Payroll Tax Forms: These forms are used by employers to report the wages, salaries, and taxes withheld from their employees' paychecks. Examples include the W-2 form in the United States or the P60 form in the United Kingdom.

Sales Tax Forms: Sales tax forms are used by businesses to report and remit sales tax collected on taxable goods or services. The specific sales tax forms vary by jurisdiction.

Value Added Tax (VAT) Forms: VAT forms are used in countries that impose a value-added tax to report and remit VAT collected on sales and claim VAT credits for purchases. Examples include the VAT return forms used in many countries.

Estimated Tax Forms: Estimated tax forms are used to report and pay estimated taxes on income that is not subject to withholding, such as self-employment income or investment income.

These are just a few examples of the numerous tax forms that may exist. The specific forms required depend on the tax laws and regulations in your country or jurisdiction. It is important to consult the tax authority's guidelines or seek professional advice to determine which forms are applicable to your situation.

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