The DR 8453 form is an essential document for Colorado taxpayers who choose to file their income tax returns electronically. This form serves as a declaration of the taxpayer's income and tax information, ensuring that all details align with the federal tax return. It includes critical sections where taxpayers must report their total income, taxable income, Colorado tax amounts, and any withholding tax. Additionally, the form requires signatures from both the taxpayer and, if applicable, their spouse, affirming the accuracy of the provided information. Taxpayers using an Electronic Return Originator (ERO) or tax preparer will find specific instructions about maintaining copies of their documents and the responsibilities of the preparer. Importantly, the DR 8453 must not be sent to the IRS or the Colorado Department of Revenue; instead, it should be retained with the taxpayer's records. Understanding the nuances of this form is crucial for compliance and for navigating Colorado's tax filing requirements effectively.