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Tax Changes

Changes are coming

For businesses registered with the city of Aurora, Colorado

Effective May 14, 2018, the city of Aurora, Colorado will be implementing a new tax software system. The software is already in use at the State of Colorado, City and County of Denver and the City of Lakewood. You may be interacting with this software through online websites like Revenue Online for Colorado, Denver eBiz Tax Center or the Lakewood Business Pro.

New PO Box mailing address.

City of Aurora Tax
PO Box 913200
Denver, CO 80291-3200


Overnight Address - All overnight mail by special couriers should be sent to the actual site address below and should reflect Lockbox Services and the Lockbox Number in the reference section of the air bill.

Include Company Name, Street Address, City, State , & Zip Code

Lockbox Services 913200
City of Aurora Tax
MAC C7301-L25
1740 Broadway St - LL2
Denver, CO 80274


New tax returns will be mailed by May 3.
New licensing software is expected to be implemented in November 2018.
Check back for regular updates.

What improvements should I expect?

  • Aurora will be shifting from paper filing to online filing for your convenience. 

  • You will experience a fast, simple & convenient way to file and manage your taxes.

  • You will be able to file and pay all tax types online.

  • You can request to go paperless and print your returns and letters from your profile.

  • You can obtain your own online access and you can allow for others like your CPA or other accounting service to have online access.

  • You can manage your account online like changing the mailing address, update contact info, request inactivation of an account, etc.

  • You can view past filings.

  • You can schedule the filing and payment of your tax return(s).

  • You can amend returns, request a refund, and add documentation. 

Other changes

  • Online users will need to obtain login access to the new Aurora Tax Portal. Current online users should expect an email approximately May 11 informing them to create a new login.

  • The new software will not accommodate for special accounting periods like 13 month or 4-4-5 accounting periods. Letters have been sent to those businesses that are affected.  

  • There will no longer be a Schedule C available for sales and use tax filers.  Full returns will need to be filed by location. Letters have been sent to those businesses that are affected. 

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