Refund Processing

Please note that in the best interest of all our taxpayers, the Colorado Department of Revenue implements measures to detect and prevent identity theft-related refund fraud. Fraud detection, along with verification that claims made on an individual income tax return are valid and the documentation is submitted with the returns, are part of the process of ensuring the return is correct and complete and that taxpayers receive the refund amount to which they are entitled. Please be aware that these measures, meant to ensure state tax dollars are going to the right person, could delay individual income tax refunds up to 60 days beyond the time frames of prior years.

When will you process my refund and when can I expect to receive my refund?

Return processing times vary depending on many factors, including complexity of the return and our verification processes. Paper returns must have all supporting documentation included to ensure smooth processing. Paper can also take longer as we get closer to the April filing deadline, when the largest number of returns are received. We encourage electronic filing, which usually improves processing time. If we are missing information or documentation to verify refund claims, the Department will send a letter by U.S. Postal Service to the mailing address we have on file for you. The letter will explain the adjustments and will request any missing information.

How do I help ensure my refund is processed quickly?

Read filing instructions carefully and ensure a return is complete and correct to the extent possible. This includes filling out all forms completely, double-checking calculations, attaching all relevant documentation and ensuring sensitive information such as Social Security numbers and bank routing and account number is thorough and accurate.

Double-check a return before submitting to determine all information is included and accurate. Pay particular attention to the following fields:

  • Name
  • Address
  • Phone Number
  • Date of Birth
  • Social Security Number or ITIN
  • Driver License or ID Number (if requested)
  • Employer ID Number on W-2 document(s)
  • Bank Account Information (Routing Number/Account Number)

Which documents may be requested by the Colorado Department of Revenue?

  • Copy of Driver License or ID
  • Copy of a document containing your name and address.
  • ​​Copy of W-2(s) and/or 1099(s) claiming Colorado tax withholding.
  • ​​Refund Amount.​                  
  • ​​Validation Key. The Department has implemented a "Validation Key" process where information will be requested to be entered on Revenue Online to validate their Colorado refund.  ​

Revenue Online is the fastest, safest and most secure means to upload requested documents.