Colorado's online tax filing system is down. On Tuesday, the colorado.gov/revenueonline/ website was telling visitors to check back in early February. The delay is leaving some filing apps pending. Your Reporter Sarah Horbacewicz reached out to the Colorado Department of Revenue to ask why this is happening. Read more: https://www.cbsnews.com/colorado/news/colorado-delayed-state-tax-returns-online-filing-system-down-department-revenue/ | CBS Colorado