Deadline extended! The state-collected sales tax filing and payment deadline for January 2026 has been extended to March 2, 2026.

 
1

DR 0020AX - Amended Metallic Minerals Severance Tax Return

The Amended Colorado Metallic Minerals Severance Tax Return (DR 0020AX) is required to be used when correcting your Colorado Metallic Minerals Severance Tax Return (DR 0020A).