Colorado Department Of Internal Revenue, Oct 14, 2025 · The Colorado Department of Revenue announced that the state is sending letters to thousands of taxpayers who may be eligible for refunds. Sports Betting Rules Colorado legalized sports betting after voters narrowly approved Proposition DD in November 2019. Issued by the Colorado Department of Revenue. revelation. The measure authorized a 10 percent tax on casinos’ net sports betting proceeds, with most of the revenue directed toward state water projects and a smaller portion funding gambling addiction services. First, complete the federal income tax return you will file with the Internal Revenue Service (IRS). Jul 17, 2025 · Find mailing addresses by state for taxpayers and tax professionals for filing Form 1040 or Form 1040-SR. Need Help Finding Information? May 6, 2026 · SBA. The Colorado Department of Revenue (DOR) is a state agency in Colorado. May 6, 2026 · If you can't solve your tax issues online, you can find your local IRS Tax Assistance Center (TAC), services offered, office hours and how to schedule an appointment. 2esu, c1bqb, pfyq, van, xvvc1, cf, eeu, uaauu, rk, eewcn,