A Colorado resident reporting federal taxable income must continue to file Colorado returns as a full-year resident no matter how long he or she is out of the country. Most such individuals are working on a temporary assignment, and return to Colorado. Because of this, there is a presumption that people from Colorado working in foreign countries are still Colorado residents.
Colorado FYI Income 28 (October 2006).
Foreign Earned Income Exclusion = Yes
Foreign Tax Credits = No
Treaty = Yes
Due Date = April 15
Accepts Federal Extensions = If 90% of the tax due has been paid, then yes.