efileSalesTax.com - California Sales and Use Tax made simple, in English and Spanish.real words, from real people
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Colorado Sales Tax e-filing software

(We also support California Sales Tax, Florida Sales Tax and Illinois Sales Tax).
efileSalesTax.com now offers a Colorado Sales Tax e-filing system that is authorized and approved by the Colorado Department of Revenue.
efileSalesTax.com is easy to use, just login to our secure web portal and upload a spreadsheet, and in seconds it is converted into a state-approved format (an XML file which is electronically submitted to the state)
Most of our customers tell us since they've started using efileSalesTax.com, it now take them half the time to file their Colorado Sales Tax returns!
Check out what our customers are saying:
“We find everything easy to use, and we are very satisfied with the submission process. The Customer Service is also excellent.”
- Dave Sheldon, National Entertainment Network, Inc.
“Your staff was super in helping us set up our new electronic sales tax filing process. A previously arduous task made simple at a reasonable price. Thanks!”
- Ginger Franke, Holy Cross Energy

What our program is and is not

Our Colorado system is designed to file the CO state level DR-0100 form, specifically for multi-location businesses that need to file a DR-0100 for each location, which is a time-consuming task.

Our system allows you to upload your DR-0100 forms in a spreadsheet, and efileSalesTax.com processes that spreadsheet into a file that the Colorado DOR accepts (an XML file).

The state's efiling system that we are integrated with doesn't yet support filing down to the sub-state locations, so until they do, we can't offer that granularity of sales tax filing. Only the state sales tax DR-0100 form.

Also, our Colorado system does not currently look up tax rates and jurisdictions. You are required to enter all the rates, sales, deductions, etc. (basically each field from the DR-0100 form)

We will keep you informed when this becomes available, as long as you register for a free account at our site, and give us permission to email you. (We hate spam, and don't send many emails)

For more information, please fill out this form:
Best time to call
Number of locations you file
on your CO sales tax return
Colorado Account Number
  * Locations are defined as the combination of a Loction ID and Jurisdiction Code as determined by the Colorado DOR
What is your industry?
Accounting software
If you use Excel, what version is it
How often do you file? (Monthly, etc.)
How did you hear about us?
What other states do you file
sales tax returns for (if any)?
Company Name

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We are authorized by the California State Board of Equalization and the Florida Department of Revenue