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Form 1045


Form 1045 is a U.S Internal Revenue Service tax form used primarily by individuals, estates, and trusts to claim certain types of tax deductions and credits. It’s also used to adjust their income for a prior tax year through a process known as carrying back certain losses. The goal of using Form 1045 is to receive a tax refund at a faster rate.


The phonetics for the keyword “Form 1045” would be “F – O – R – M Ten Forty-Five”.

Key Takeaways

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  1. Usage: Form 1045 is primarily used by individuals, estates, and trusts in the United States to apply for a quick tax refund by utilizing their net operation loss (NOL), nonbusiness deductions, or overpayments.
  2. Timing: One major advantage of using Form 1045 is that individuals don’t have to wait until the end of the tax year to claim their refund. This form can be filed right after the end of the year in which an NOL, unused credit, or overpayment occurs.
  3. Calculations and Limitations: Form 1045 includes complicated tax calculations, so it’s often advisable to consult with a tax professional when filing it. Additionally, there may be certain limitations based on taxable income and filing status.

“`Please note that this answer assumes a basic understanding of US tax law and processes and may not apply to everyone. Always consult with a tax professional before making decisions based on this information.


Form 1045, administered by the Internal Revenue Service (IRS) in the United States, is used by individuals, estates, and trusts to claim certain types of tax benefits, thus playing a significant role in these entities’ financial management. The form is particularly crucial for those looking to claim a quick refund of taxes from the carryback of a net operating loss (NOL), the carryback of an unused general business credit, the application of a prior year minimum tax credit, or losses related to a casualty or theft. As such, Form 1045 serves as a potent instrument in managing tax liabilities, and it can provide significant financial relief for those who have experienced a loss in income or wealth.


Form 1045, issued by Internal Revenue Service (IRS) in the United States, serves a very particular but crucial function in the realm of taxation. Principally, it is used to process quick refunds for losses incurred, referred to as “net operating losses” (NOLs), or too much tax paid over the previous two years. Essentially, the form allows individuals, trusts, and estates to amend tax payments or income adjustments retroactively.The purpose of the Form 1045 is beneficial to taxpayers who’ve made more tax payments than they should have in the recent past, or suffered a sudden extraordinary loss in current year. By utilizing a Form 1045, a taxpayer can meet the need to “carry back” such losses to a more prosperous previous tax year, and secure a tax refund that might otherwise have gone unrealized. This aids businesses and individuals in times of unfortunate financial circumstances, assisting in tiding over financially challenging scenarios.


Form 1045 is a tax document used by individuals, trusts, or estates to apply for a quick tax refund adjustment of certain losses. Three real-world examples of its use could be:1. A freelance designer had a decrease in income during a financial year due to a downturn in business. He also incurred significant losses because of damage to his home office from a natural disaster. Due to these circumstances, he uses Form 1045 to apply for a net operating loss (NOL) carryback which would offer a refund adjustment on his past tax returns.2. An entrepreneurial couple opened a restaurant, but unfortunately, the business failed and they suffered a considerable monetary loss within the first financial year. In this case, they can fill out Form 1045 to carryback this loss and offset their taxable income from the previous years, resulting in a possible refund.3. An estate representative looks after an estate which suffered financial loss due to high maintenance costs and dwindling investment returns. To claim a quick tax refund and help restore the estate’s financial health, she might use Form 1045 to apply for an appropriate adjustment related to these losses.

Frequently Asked Questions(FAQ)

What is Form 1045?

Form 1045 is a tax document issued by the United States Internal Revenue Service (IRS) used by individuals, trusts, and estates to claim certain types of tax credits and deductions.

When should Form 1045 be used?

You should use Form 1045 when you need to apply for a quick tax refund resulting from the carryback of a net operating loss (NOL), unused general business credit, or overpayment of tax due to a claim of right adjustment.

Who can file a Form 1045?

Individuals, estates, and trusts can file Form 1045.

Can corporations use Form 1045?

No, corporations use Form 1139, Corporation Application for Tentative Refund.

How often can I file Form 1045?

One Form 1045 can be filed per tax year. Remember, you must file it within one year of the end of the tax year in which the credit or loss arises.

Can Form 1045 be filed electronically?

No, the form needs to be filled out and mailed to IRS. Please refer to the official IRS instructions to ensure the form is mailed to the appropriate address.

How long does it generally take to receive a refund after filing Form 1045?

The IRS typically processes these refunds within 90 days from the date they receive Form 1045.

Where can I get a copy of Form 1045?

You can download a copy of Form 1045 directly from the IRS website.

How can I calculate the net operating loss (NOL) for Form 1045?

NOL is calculated by substracting your tax deductions from your gross income. If the deductions exceed the income, you have a net operating loss. For detailed assistance, it’s recommended to consult a tax professional or refer to the IRS provided guidelines.

Is there a deadline for filing Form 1045?

Yes, the form must be filed within a year of the end of the tax year in which an NOL, unused credit or claim of right adjustment occurred.

Related Finance Terms

Sources for More Information

IRSInvestopediaTurboTaxLegal Information Institute – Cornell Law School

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