Knowledge base
If you are unsure of which issue to select, please select "Support assistance needed."
If you've received notices from multiple jurisdictions, please submit a separate request for each jurisdiction.
Leave this field blank if this notice is unrelated to a Colorado locality.
If no Letter ID or Notice Number is listed on the notice, please enter "None".
The issue date is usually on the top-right corner of the notice. If no date is listed, please enter the date you received the notice.
If an effective/deadline date is not listed on the notice, please enter today's date.
If a tax period year is not listed on the notice, please select "None".
If multiple months are listed, please enter the earliest month. If a tax period month is not listed on the notice, please select "None."
This can be found on the Unprocessed transactions page under the "Error type" column.
If you would like to request multiple countries, please submit a separate request for each.
You can only submit a “Country request” if you are already registered within the country you are requesting. If you have a registration pending, include the details in your request.
Please enter the details of your request. A member of our team will respond as soon as possible.