Reliable online filing for C-Corporation taxes.
Form 1120 C-Corporations
Trusted guidance for Form 1120, payroll tax forms, and everything your corporation needs to stay compliant.
Identify eligible corporate deductions with step-by-step guidance
Save time with import and data entry tools.
Maintain clear records of corporate income, expenses, and shareholder equity
Provides ALL forms for Fed & State
This was a tremendous help to me and was easy to understand and do thereby saving me several thousand dollars by not having to use our regular accountant.
Verified TaxAct Customer
Mar 7, 2026
Easy Peasy.
My first time this year with TaxAct for a C-Corp and for personal. Really couldn't have been easier and I was done with both in record time.
Never, ever going back to "the other guys".
Verified TaxAct Customer
May 24, 2025
Trusted filing with guaranteed accuracy.
Join over 650,000 businesses who have trusted us with their tax returns since 2003.
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Comprehensive corporate deduction guidance.
Identify allowable corporate expenses including salaries, benefits, rent, depreciation, and start-up costs.
Support for shareholder, officer, and payroll reporting.
Easily enter officer compensation and integrate payroll information to ensure full compliance.
Depreciation and asset management made simple.
Choose between MACRS, bonus depreciation, and Section 179 with step-by-step support.
Easy document storage and export.
Access prior-year filings and export finalized forms for bankers, investors, or internal reporting needs.
Built-in checks for corporate compliance.
Avoid common errors with alerts for missing schedules, balance sheet discrepancies, and book-to-tax adjustments.
Smart guidance on credits and carryovers.
We help you identify general business credits, NOL carryforwards, and other tax benefits that lower your corporate liability.
TaxAct voted “Best Paid Tax Prep Software”
“Among the major paid tax filing solutions, TaxAct is the big winner with readers this year, besting bigger names in terms of satisfaction, security, ease of use, and trustworthiness.
If you must pay to file, the service to put your money and faith in is TaxAct.”
100% Accuracy Guarantee*
Rest assured, TaxAct guarantees the calculations on your return are 100% correct.
Satisfaction Guarantee*
With any TaxAct Online product your satisfaction is 100% guaranteed.
7-year return access
Easily access and print copies of your prior returns for seven years after the filling date.
Prefer Offline? Download the Software.
Edit directly in forms and work offline with our downloadable software for PC.
View Desktop FilingTwo tax returns. One connected experience.
Bundle C Corporations with your personal tax return.
From preparing your corporate tax return to seamlessly incorporating key tax data into your personal filing, our bundled solution keeps everything aligned.
Get accurate corporate tax calculations, clear insight into how salary, dividends, and equity impact your personal taxes, and peace of mind knowing your business and personal outcomes work together — not in silos.
Select list of Federal and State tax forms supported
Below are the Partnership forms included with this product. Release status is updated as forms become available. For the most up-to-date status of any form, visit our main forms page.
Form | Description |
|---|---|
| Form 6000 | Alaska Corporate Net Income Tax Return |
| Form 6240 | Payment Voucher Corporation Net Income Tax |
| Form 6300 | Alaska Incentive Credits Summary |
Do it yourself
File with confidence using our simple, step-by-step guidance and built-in tools.
Your data stays secure with trusted safeguards, and our 100% Accuracy Guarantee* has you covered. And whenever questions come up, our support team is here to provide fast, reliable help so you can file with confidence.
Start FilingFrequently Asked Questions
Create a TaxAct account and select C Corporations (Form 1120). Enter your corporation's details, then work through gross receipts, income, deductions, and any required schedules with our guided interview before e-filing directly with the IRS.
