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Colorado Taxes

Learn How To Prepare And efile Your State Of Colorado Income Tax Return with your Federal Tax Return. Find CO Tax Forms, Tax Return Filing Deadlines, Other CO Info.

Instructions on How to Complete and Sign a Colorado Tax Amendment Form. Download, Print the Form 104X and Mail It To the CO State Tax Agency.

Colorado or CO Income Tax Rates, Income Brackets, Standard Deductions, and Forms by various Tax Years.

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