W-2 & 1099 Statements

W-2 Statements

When filing a paper return, all W-2s and/or 1099s that show Colorado income tax withholding must be stapled to the front of the form where indicated. When filing an electronic return, attach scanned copies of all W-2s and/or 1099s that show Colorado income tax withholding to the e-filed tax return. If you are unable to attach W-2s and/or 1099s to your e-filed return, submit through Revenue Online.

1099 Statements

The Department requires you to attach to your return any 1099 statements with Colorado withholding. Following are examples of different 1099 statements a taxpayer might receive:

  • 1099-G from government agencies. The Department of Revenue issues statements for any tax refund more than $10.
  • 1099-INT from financial institutions and government agencies showing interest earned.
  • 1099-DIV from brokerage companies showing dividend income.
  • 1099-MISC from management companies showing rental income.
  • 1099-R from pension organizations showing pension income.

Personally Identifiable Information (PII)

The Colorado Department of Revenue (CDOR) is aware of the recent IRS change to allow for the masking or truncation of part of the Social Security Number (SSN) on the federal W-2 form. CDOR requires that the SSN be revealed in full on the W-2 so that our systems can process the information. Masked or truncated W-2 forms will not be processed. 

CDOR collects personally identifiable information (PII) and other information only as necessary to administer our programs.  The information provided to CDOR will be used only for that purpose. For more information on how we safeguard PII visit our Taxpayer Security Safeguards page.