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File C Corporation Taxes Online with Accurate, Automated Form 1120 E-Filing
File your C corporation tax return online using secure, IRS-authorized software. X.TAX helps businesses eFile Form 1120 accurately, maximize deductions, and stay compliant, without manual complexity.
File Form 1120 Online for your C-Corporation Tax filing at $159
What's Form 1120?
Form 1120 is the official U.S. federal income tax return used by C corporations to report annual business income, expenses, deductions, and tax liability to the IRS.
Every C corporation operating in the United States must file Form 1120 each tax year, even if no tax is owed.
Filing Form 1120 accurately is essential to stay compliant, avoid penalties, and correctly calculate corporate income tax. With online Form 1120 filing, businesses can prepare, review, and e-file their C corporation tax return faster and with fewer errors.
Report Business Income
Report all revenue earned by your C corporation, including sales, services, and other taxable income, as required on Form 1120.
Claim Eligible Deductions
Reduce taxable income by claiming qualified business deductions such as operating expenses, payroll, rent, depreciation, and credits allowed for C corporations.
Calculate Corporate Tax Liability
Form 1120 calculates how much federal corporate tax your business owes, or confirms if no tax is due based on income and deductions.
Who Needs It?
C corporations of all sizes, from global giants to local retailers, and LLCs taxed as corporations. If you’re operating under corporate tax rules, Form 1120 is your must-file.
Skipping it? Think again. The IRS penalty for not filing on time is 5% of unpaid taxes per month—a headache you really don’t need.
What You Need to File Form 1120
No surprises. Just AI-tomatically smooth preparation
What You’ll Need to Get It Done
Gather these essentials before you begin
- Your EIN : Think of it as your corporation’s social security number.
- Income Records: Gross receipts, investments, and rental income.
- Expenses: Salaries, office costs, utilities, and other deductible items.
- Schedule L: Details your assets and liabilities.
- Schedule M-1: Explains income differences between your books and tax filing.
- Tax Payments: Any estimated payments made this year.
Why X TAX Is for You?
Taxes are complex—but we make them AItomatically manageable.
Keep You Audit-Ready
Every tax filing is compliance focused.
Maximize Deductions
Eligible expenses, from salaries to rent, won’t go unnoticed.
Support When You Need It
Whether you DIY or use Assisted Filing, expert help is always a click away.
Add-On's
Stay compliant with proactive alerts, audit protection, and real-time IRS monitoring. Leverage expert assistance for complex filings and full audit support.
Let us handle taxes so you can focus on your business.
Audit Protection
$99/per filing
Tax Expert Review
$59/per filing
State Annual/Franchise Tax Reporting
$129/per filing
How to E-File Form 1120
It just takes 4 simple steps
Set Up Your Account
Quick, secure, and ready to go in minutes
Upload Your Info
Add income, expenses, and schedules.
Review Before You File
Catch errors and optimize deductions with our smart tools.
Submit Directly to the IRS
One click, and you’re done.
Our process prioritize accuracy, compliance, and speed – so you can focus on running your business.Â
Here’s What We’re Building Towards
Your feedback is our foundation.
What You Need to Know About X TAX
What’s the deadline for Form 1120?
Can I use X.TAX for filing small business taxes?
What will Audit Protection cover?
- Expert guidance on IRS or state notices Helps you understand and resolve inquiries correctly.
- Professional review of correspondence Ensures the right actions are taken on every notice.
- Help preparing documentation Gathers what you need for audit responses.
- Assistance drafting responses Clarifies information and communicates with tax authorities.
- Error review and correction support Addresses issues if your filing triggers an audit.
- Step-by-step progress tracking Follow updates inside X.TAX for full visibility.
What will Expert Review cover?
- Professional Return Review A trained tax expert reviews your return for accuracy, proper calculations, and completeness.
- Error & Issue Detection Identifies missing information, inconsistencies, and common rejection triggers.
- Compliance Check Ensures your forms, schedules, and data align with IRS and state filing standards.
- Clear Correction Guidance Provides easy-to-follow instructions on updates needed before e-filing.Â
- Reduced Rejection Risk Professional review lowers the chance of delays or rejections by tax authorities.
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Why It matters?
Tax Expert Review reduces stress, saves time, improves accuracy, and lowers the risk of penalties by ensuring users have expert help throughout the audit process. It provides peace of mind and stronger compliance for your business year-round.