Colorado e filer 2026

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The document is an e-Filer Attachment Form (DR 1778) from the Colorado Department of Revenue, providing instructions for submitting required documentation when e-filing taxes. It emphasizes the importance of using the online submission option to avoid delays and outlines the necessary information and documents needed for various tax credits. The form must be mailed if electronic attachment fails, and it includes sections for taxpayer details and documentation checkboxes.

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Click ‘Get Form’ to open the e-Filer Attachment Form in the editor.
Begin by entering the tax year or fiscal year at the top of the form. Ensure you use the correct format (MM/DD/YY).
Select the appropriate tax type from the options provided, such as Individual Income or C Corp Income.
Fill in your personal information, including your last name, first name, middle initial, and spouse’s details if applicable.
Enter your Social Security Number (SSN) and your spouse's SSN if necessary. Include your FEIN if applicable.
Complete your address details: street address, city, state, and zip code.
Mark the box next to each document you are submitting. Refer to Colorado.gov/Tax for more information on required documentation.
Sign and date the form at the bottom to validate your submission before finalizing it in our platform.

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How do I submit an e filer attachment in Colorado?

Select Submit an e-Filer Attachment in the File a Return or PTC Form box on the right-hand side of the Revenue Online home page. Read the instructions and select the Next button. Follow the steps to enter the Taxpayer Information, Spouse Information (if applicable), and Mailing Address. Then, select Next.

How do I submit an efiler attachment in Colorado?

Go to Revenue Online(opens in new window), but do not log in. Select Submit an e-Filer Attachment in the File a Return or PTC Form box on the right-hand side of the Revenue Online home page. Read the instructions and select the Next button.

How to attach W2 to Colorado tax return?

When filing a paper return, all W-2s and/or 1099s that show Colorado income tax withholding must be stapled to the front of the form where indicated. When filing an electronic return, attach scanned copies of all W-2s and/or 1099s that show Colorado income tax withholding to the e-filed tax return.

Why cant I electronically file my Colorado tax return?

The state of Colorado isnt ready to start accepting e-filed tax returns. You can e-file your Colorado tax return with TurboTax on January 30, 2025. Well hold your state return until Colorado starts accepting returns the week of February 14, 2025.

How do I attach documents to my tax return?

You can attach certain documents to your e-filed return on the File Attachments screen in the Final Steps menu. If you only have a paper copy and not an electronic copy of a document, youll need to scan it or take a clear picture of it to upload it.

colorado dr 1778

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How much is $100,000 taxed in Colorado?

If you make $100,000 a year living in the region of Colorado, United States of America, you will be taxed $26,786. That means that your net pay will be $73,214 per year, or $6,101 per month.

Can I efile from my phone?

You can use your computer, tablet, or mobile device to prepare and electronically file whenever and wherever you want. You may even qualify for free e-file software or assistance with filing. For more information, see: Direct File.

Can I file my Colorado taxes online?

Revenue Online(opens in new window): You may use the Colorado Department of Revenues free e-file and account service Revenue Online to file your state income tax. You do not need to login to Revenue Online to File a Return.