An individual is a resident of Colorado if they have domiciled in the state or hold permanent home and legal residence in the state at which they stay more than six months during the tax year. Residents must file Colorado income tax return. The guidelines for your filing status for your grossed income is at the following link: here
A part-year resident of Colorado is anyone who moved into the state with the intention of making his/her home there or a Colorado resident who moved out of Colorado with the intention of making his/her home elsewhere any time during the tax year. Form 104PN is used for e-filing Part-Year Residents. The guidelines have been provided at the following link: here.
An individual who did not reside within the state of Colorado during the tax year and has worked in or received income from the state of Colorado is consider a non-resident. Non-residents are subject to Colorado filing requirements if they are required to file a federal income tax return and had taxable income from Colorado. Form 104PN is used for e-filing Non-Residents. The guidelines have been provided at the following link: here.