what are the state income tax requirements for individuals in colorado
The only requirement is that at least 90% of your tax liability must be paid by the original deadline (April 15) to avoid late fees. You can mail your state tax payment using Colorado Form DR 0158-I (Payment Voucher for Automatic Colorado Extension for Individuals). Note that you are not required to file Form DR 0158-I if you electronically pay your state tax liability online.