Joint Tax Returns and Couples in Civil Unions (Illinois)

By Matthew A. Quick The Illinois Department of Revenue has confirmed that couples in civil unions shall have the ability to file joint tax returns with the State of Illinois. However, there is still no joint-filing tax status on the federal level, which means each partner must file a return with the IRS as though they are single. Civil union couples continue to not be permitted to file federal income taxes as married, because the federal government does not recognize the union as a legal marriage.