For the 2025 tax year we will be using this new Agent eFile site for submitting protests, uploading evidence, and doing settlements & withdrawals. You can also view/download the CAD evidence files and the Appraisal Notice from here.
For the time being, we will still be utilizing the legacy Agent Portal for informal informational purposes only. There you can view the informal procedures, appraiser contact information, TopLine procedures, and your scheduled formal ARB Hearing Docket. You can access the legacy portal at: Agent.CollinCAD.org
For technical issues with either site, please submit a help ticket at: Help.CollinCAD.org/efile
For questions regarding AOA's or details of your protests, please contact the Agent Coordinator by email at: 
If you are a property owner, please use our Taxpayer Portal at: OnlinePortal.CollinCAD.org
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