The Colorado TABOR credit is applied through a sales tax refund. You will see the option for this when you are done entering your credits in the Colorado program in TurboTax. Look for the screen that says A few things before we wrap up your state taxes. Choose the State Tax Refund option, answer a couple of questions on the next two screens and you will qualify for the credit of $800 for a single filer and $1,600 if you are filing married-joint.