What is Form 1120?

Form 1120 is the U.S. Corporation Income Tax Return that C Corporations must file annually with the IRS to report business income, deductions, gains, losses, credits, and calculate federal income tax liability. For the 2025 tax year filed in 2026, C Corporations must file Form 1120 by April 15, 2026, or request an extension to October 15, 2026. The form captures comprehensive financial information, including gross receipts, cost of goods sold, officer compensation, and applies the 21% corporate tax rate to taxable income. Businesses making a Late C Corporation election for 2025 will file Form 1120 once their election receives IRS approval during the 2026 filing season.

Related Terms

What is a C Corporation?

What is a Late C Corporation election?

What is Form 8832?

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Tax loss harvesting

Transform investment losses into strategic tax advantages and optimize your portfolio's performance with AI-driven precision.

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Child traditional IRA

Open a Traditional IRA for children with earned income. Contribute up to $7,000 annually with full deduction, giving them decades to grow tax-free.

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Employee achievement awards

Award your team for service milestones and safety achievements while maximizing allowable deductions up to $1,600 per employee.

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Health reimbursement

Set aside money on a pre-tax basis to pay for qualified medical expenses to maximize tax savings opportunities.

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Child & dependent tax credits

Claim up to $2,000 per child & $500 per other dependent. Automatically maximize your child and dependent-related tax credits.

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Health savings account

Set aside money on a pre-tax basis to pay for qualified medical expenses to maximize tax savings opportunities.

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Sell your home

Transform your home sale into a tax-saving opportunity.

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Employee achievement

Skill up your team, scale down your business expenses.

Military Veteran hiring approved with tax credit forms and a 46% savings increase from last year.

Work opportunity tax credit

Unlock tax savings for empowering your community through hiring.

Energy drilling site showing equipment, surveys, and contract labor categorized for tax deductions.

Oil & gas deduction

Drill into tax savings. Maximize deductions for both tangible and intangible drilling costs.

A woman and child reviewing W-2 tax forms for family business, showing 46% tax savings.

Hiring kids

Reduce taxable income & self-employment tax by hiring your kids.

Home office

Deduct qualified expenses for using your home for business purposes.

Meal expenses

Business can typically deduct 50% of meals associated with doing business with some cases allowing up to 100% deduction.

Travel expenses

Businesses can deduct necessary travel expenses, like airfare and lodging, directly related to operations for tax savings.

Vehicle expenses

Vehicle tax deduction allows deduction of business vehicle expenses, using a per-mile rate or actual costs, from taxable income.

Late S election

A Late S Election lets a corporation request IRS S corp status post-deadline.

Late C election

A Late C Election is a request to the IRS for C corporation status after the deadline.

Depreciation

Put your fixed assets to work for you by utilizing depreciation to find and compare tax savings in minutes.

R&D tax credit

Fuel your venture's growth and innovation with the R&D tax credit. Not just for tech firms or big corporations.

Clean vehicle

Businesses and Individuals can receive a tax credit for purchasing new eco-friendly vehicles. Individuals may also qualify on used eco-friendly vehicles.

Residential clean energy

Taxpayers who invest in renewable energy improvements for their home or second home may qualify for a credit to lower their income tax.

Augusta rule

The Augusta Rule lets homeowners rent their property tax-free for up to 14 days a year without reporting the income.

Roth 401k

Roth 401(k) lets employees and individuals make after-tax retirement contributions, offering tax-free growth and withdrawals.

Traditional 401k

Traditional 401(k) plans offer pre-tax retirement savings for employees, with companies reducing taxable income via contributions.