Canva illustration " data-large-file="https://i0.wp.com/newspack-coloradosun.s3.amazonaws.com/wp-content/uploads/2026/09/income-tax-calculator.png?fit=780%2C520&ssl=1" /> The Colorado Sun created a calculator that shows how your income tax rate, and therefore your bill, would change if voters pass a measure in November imposing a graduated income tax system…