Form 1045: How to get a quick refund from net operating losses

Your business lost money this year. The silver lining of a net operating loss is that it can offset income from other years, reducing your overall tax burden. Instead of letting that loss sit until future profitable years, you can carry it back to a prior year when you paid taxes and get an immediate refund.

Form 1045 is the tentative refund application that makes this happen quickly. While amended returns can take months to process, Form 1045 requires the IRS to act within 90 days. For businesses that qualify for NOL carryback treatment, this quick refund process can provide critical cash flow when you need it most.

But the rules have changed. Understanding when carrybacks are still available and how to claim them using the Form 1045 instructions is essential before you start.

NOL carryback rules have changed significantly

The Tax Cuts and Jobs Act of 2017 fundamentally changed how net operating losses work. If you remember the old rules where any business could carry losses back two years, those days are largely gone.

• Most NOLs arising after 2020 must be carried forward only. For losses generated in tax years beginning after December 31, 2020, the general rule is no carryback. You carry the loss forward indefinitely and use it against future income. The loss can offset up to 80% of taxable income in any carryforward year.This means that most businesses currently incurring losses cannot use Form 1045 to obtain a quick refund. There is no carryback to claim, so there is no prior-year refund to request.
• Farming losses retain 2-year carryback eligibility. The significant exception is farming losses. Losses from farming businesses can still be carried back two years. If your business has a farming loss as defined under Section 172, you can carry that loss back to prior profitable years and claim a net operating loss refund.For professional service firms and most other businesses, this exception does not apply. But for agricultural operations, consulting firms serving the farming industry, or businesses with farming components, the carryback remains valuable.
• The CARES Act created a temporary window that has now closed. During 2020 and 2021, businesses could carry back NOLs arising in 2018, 2019, and 2020 for five years. This provision helped businesses recover taxes paid during profitable years before the pandemic. That window has closed for most taxpayers, though some may still be processing claims or dealing with IRS adjustments from that period.

Form 1045 provides faster refunds than amended returns

When you do qualify for an NOL carryback claim, you have two options for claiming the refund: file an amended return (Form 1040-X for individuals) or file Form 1045 for a tentative refund.

1. The tentative refund application is processed within 90 days. By law, the IRS must process Form 1045 within 90 days of receiving it. Compare that to amended returns, which can take six months or longer. When cash flow matters, the quick refund process through Form 1045 provides a significant timing advantage.

2. The refund is tentative, not final. The speed comes with a caveat. The IRS processes Form 1045 without the full examination that an amended return receives. They may later audit your return and adjust or reverse the tentative refund if they disagree with your calculations. The refund is real money in your account, but it remains subject to IRS review.

3. Strict deadline applies. Form 1045 must be filed within 12 months after the close of the tax year in which the NOL arose. If your loss occurred in tax year 2024, you must file Form 1045 by December 31, 2025. Miss this deadline, and your only option is the slower amended return process.

4. Corporations use Form 1139 instead. The quick refund process for corporate NOL carrybacks uses Form 1139, Corporate Application for Tentative Refund, rather than Form 1045. The concept is the same, but the form differs. Form 1045 is for individuals, estates, and trusts.

Completing the quick refund application

The Form 1045 instructions walk through calculating your NOL and applying it to prior years. Understanding the structure helps ensure your application is complete.

1. Page 1 summarizes the refund request. Enter your identification information, the tax year of the loss, and the prior years to which you are carrying the loss. Indicate the type of loss (NOL, unused credit, or other) and the amount of refund requested for each carryback year.

2. Schedule A computes the net operating loss. This schedule calculates your actual NOL by starting with your taxable income (or loss) and making required adjustments. Not all losses on your return become NOLs. Personal exemptions, capital losses in excess of capital gains, and non-business deductions are adjusted when computing the NOL.

For farming losses specifically, the schedule separates farming and non-farming portions because different carryback rules apply to each.

3. Schedule B applies the carryback to prior years. Apply your computed NOL to income in the carryback years. The schedule recalculates the prior year's tax with the NOL deduction included, determining the overpayment that becomes your refund.

If your NOL exceeds one carryback year's income, the excess carries to the next prior year. A $100,000 farming loss might absorb $60,000 of income from Year 1 and $40,000 from Year 2, generating refunds from both years.

4. Attach supporting documentation. Include copies of the returns for the carryback years if you have not previously filed them with the IRS. Attach any schedules or statements supporting your NOL calculation.

When to use Form 1045 versus amended returns

The quick refund process is appealing, but it is not always the best choice.

1. Use Form 1045 when speed matters and your situation is straightforward. If you have a clear farming loss, clean prior-year returns, and need cash quickly, the 90-day processing is valuable. The tentative refund gets money in your hands while you can still file an amended return later if adjustments are needed.

2. Use amended returns when your situation is complex. If your carryback involves multiple issues, interacts with other credits or deductions, or requires significant explanation, an amended return may process more smoothly. The IRS gives amended returns a fuller review, which can work in your favor when positions need explanation.

3. Consider filing both. Some taxpayers file Form 1045 for the quick tentative refund and simultaneously file an amended return for a full examination. The amended return supersedes the tentative refund, and any adjustments get reconciled. This approach provides fast cash while ensuring a complete review.

The refund may be adjusted later

Because Form 1045 is processed quickly without full examination, the IRS reserves the right to review and adjust your refund later.

1. An examination can occur within the statute of limitations. The IRS has three years from the date you filed the original return (or two years from the date tax was paid, if later) to examine your return. Carrying back a loss to a prior year can reopen that year for examination related to the carryback.

2. Adjustments create additional tax owed. If the IRS determines your NOL was smaller than claimed or your carryback calculation was incorrect, they will assess additional tax plus interest. You received a tentative refund that was too large, and you must pay back the excess.

3. Keep thorough documentation. Support your NOL calculation with the records that substantiate your loss. If the loss relates to farming, document the farming activity and the business nature of the losses. The documentation you maintain today protects you if the IRS questions your refund years later.

The form now serves a narrower purpose

Form 1045 was more broadly useful before the Tax Cuts and Jobs Act eliminated most carrybacks. Today, its primary application is farming losses that retain carryback eligibility.

If your business has a qualifying farming loss, the quick refund process remains valuable. Filing within the 12-month deadline and completing the schedules accurately puts cash in your hands within 90 days, rather than waiting months for an amended return to be processed.

For businesses without farming losses, the form has limited application. Your net operating losses carry forward to offset future income rather than back to recover prior taxes. That is a different planning conversation, focused on projecting when you will have sufficient income to absorb the loss carryforward.

Understanding when Form 1045 applies and when it does not prevents wasted effort and ensures you pursue the refund options actually available to your situation.