Spend Less Time on Taxes! File Your Colorado Business Returns in Minutes!

X.TAX provides expert Business tax solutions for filing all your CO business tax forms, 100% accuracy, Audit Protect and Assist Filing. 

Avoid Costly Mistakes by Understanding CO Business Taxes

Know More About Your Colorado Biz Taxes
Colorado’s business tax environment is highly attractive, featuring a flat corporate income tax rate of 4.55%1. The state offers a range of tax credits and incentives, promoting a vibrant business climate. In 2023, Colorado’s favorable tax policies spurred significant investment, driving innovation and economic growth across diverse industries.

Colorado Business Tax Forms 

Know CO Business Tax Forms, which required for your business to stay compliant with Colorado regulations and avoid penalties.

Corporations 

Partnerships

Limited Liability Companies (LLCs) 

Estates and Trusts 

Sales and Use Tax

How to file CO Business Tax online with X.TAX 

Your Colorado Business Tax Filing is Fast and Error-Free with X.TAX 

Create an Account

Set up your profile securely.  

Upload Your Information

Enter your income, expenses, and tax forms.  

Review for Errors

Use smart tools to verify accuracy.  

Submit to the State

File with one click and track your submission.  

Key CT Business Tax Deadlines

Keep track of Connecticut deadlines with X.TAX reminders.

Business Type Form Due Date Extension Deadline
Corporations Form 1120: C Corporation Income Tax Return April 15, 2025 October 15, 2025
Form 1120S: S Corporation Income Tax Return March 15, 2025 September 15, 2025
Form DR 0112: Corporate Income Tax Return (C-Corporations) April 15, 2025 October 15, 2025
Form DR 0110: S Corporation Income Tax Return March 15, 2025 September 15, 2025
Form DR 0104: Corporate/S Corporation Income Tax Extension Application April 15, 2025 (automatic extension granted) N/A
Form DR 0112C: Combined Corporate Income Tax Return April 15, 2025 October 15, 2025
Form DR 0110C: Composite S Corporation Return March 15, 2025 September 15, 2025
Form DR 0112D: Corporate Income Tax Payment Voucher April 15, 2025 N/A
Form DR 0111: Corporate Estimated Tax Payment Voucher Quarterly: April 15, June 15, September 15, December 15 N/A
Partnerships Form 1065: Partnership Income Tax Return March 15, 2025 September 15, 2025
Form DR 0105: Partnership Income Tax Return March 15, 2025 September 15, 2025
Schedule K-1 (DR 0105): Partner’s Share of Income, Deductions, Credits March 15, 2025 N/A
Form DR 0105C: Composite Partnership Return March 15, 2025 September 15, 2025
LLCs LLCs filing as a partnership use Form DR 0105 deadlines, and those filing as a C Corporation use Form DR 0112 deadlines. Varies Varies
Estate and Trusts Form DR 0105: Fiduciary Income Tax Return April 15, 2025 October 15, 2025
Schedule K-1 (DR 0105): Beneficiary’s Share of Income, Deductions, Credits Same as Form DR 0105 N/A
Sales and Use Tax Form DR 1002: Sales Tax Return Last day of the month following the reporting period N/A
Form DR 1003: Use Tax Return Last day of the month following the reporting period N/A
Form DR 0592: Sales and Use Tax Exemption Certificate Used at the time of purchase N/A

Colorado Business Tax Exemptions 

Save More with Your CO Exemptions

Sales Tax Exemptions

Manufacturing Exemptions

Income Tax Credits

Property Tax Exemptions

X.TAX is simplifying CO Business Tax Filing Online  

Accurate, Easy, and Built for Your CO Biz Tax Filings 

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RiskScore

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QuickBooks Integration

Know Why Colorado Businesses Love X.TAX

Fast, Accurate, and Made for Colorado

Colorado Business Tax FAQs

Your Questions About CO Business Tax Filing, Answered
X.TAX simplifies Colorado tax filings with a user-friendly platform, ensuring accuracy and compliance with Colorado’s unique tax rules
Yes! X.TAX supports filing for all major Colorado business tax forms, making it fast, convenient, and fully compliant with state regulations
Deadlines vary by business type and tax form. X.TAX provides automated reminders so you never miss a crucial Colorado filing date.

Absolutely. X.TAX identifies all eligible Colorado-specific tax credits and exemptions to maximize your savings while keeping you compliant. 

Yes, your data is secure with X.TAX. We use advanced encryption to protect your information throughout the filing process.
Not at all. X.TAX is designed for everyone, from tax novices to experts. Step-by-step instructions make it easy for any Colorado business owner to file confidently.