Couples in a civil union that are permitted to file federal income tax returns jointly can now file their Colorado income tax returns jointly as well.
Governor Hickenlooper signed the bill into law last Thursday (February 27, 2014). It requires couples in a civil union to file their Colorado taxes using the same filing status used on their federal tax return. The intent of the legislation is to align Colorado with updated federal tax law that permits joint filing for married same sex couples.
The new law will apply to tax years beginning on January 1, 2013 and any other income tax years that are still open under Section 39-21-107 or 39-21-108, C.R.S.