Forms and guidance

Tax.Colorado.gov

Tax.Colorado.gov/individual-income-tax-forms

Colorado Individual Income Tax Guide

Colorado Individual Credit Schedule (DR 0104CR)

Colorado Earned Income Tax Credit for ITIN Filers Schedule (DR 0104TN)

IRS.gov/credits-deductions/individuals/earned-income-tax-credit-eitc

Form 1040 and 1040-SR Instructions

IRS Publication 596, Earned Income Credit (EIC)

IRS Publication 3524, EITC Eligibility Checklist