If you efiled, you can use this tool to be sure the state return was accepted:
https://shop.turbotax.intuit.com/efile/efile_status_lookup.jsp
The Colorado DOR has announced possible delays for processing tax refunds of up to 8 weeks or more due to enhanced tax refund fraud detection efforts.
For info on how to check on your state refund, see the following FAQ:
FAQ: How do I track my Colorado state refund?
https://ttlc.intuit.com/replies/4779657
