Form DR 1322 should have been printed and mailed with your tax return but, since you've already e-filed your Colorado state return, you should contact their Department of Revenue for submission guidance. See Contact Us By Phone.
Colorado Form DR 1322, Heat Pump System or Heat Pump Water Heater Eligibility Certification and Assignment Election, is a document that requires signatures, and therefore can't be submitted with an electronically-transmitted return. You're supposed to print and mail your return to claim the Refundable Heat Pump Credit.
See DR 1322 - Heat Pump System or Heat Pump Water Heater Eligibility Certification and Assignment Electi... for more information.
The credit is claimed on line 14 of Form 104CR, Individual Credit Schedule 2023, which is supported by TurboTax.
To mail Form DR 104 and all attachments:
With a payment, send to:
COLORADO DEPARTMENT OF REVENUE
Denver, CO 80261-0006
Without a payment, send to:
COLORADO DEPARTMENT OF REVENUE
Denver, CO 80261-0005
