The Department of Revenue is processing 2023 income tax returns. For more information, please read the Department's announcement.

 
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DR 0158-I - Extension Payment for Colorado Individual Income Tax

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Colorado offers an automatic six-month extension to file your income tax return if you cannot submit your return by the April 15 due date. This means that you can file your return by October 15. While there is an extension to file, there is not an extension to the payment due date. Penalty and interest are assessed if certain payment criteria are not met.