Hi Everyone. I am starting up a business in Lower Downtown Denver and I can't seem to find the right answer to this on the Colorado Department of Revenue website. At this time, my business is strictly services. I am not selling retail products, but that may happen in the future. If I am not selling retail products, I don't need a retail license yet. Right now it looks like I don't have any tax filing options for my business because all I can find is retail stuff. I know that if I'm doing business in Denver, I still need to cover taxes for PD/FD/RTD. Is that the Use Tax? How do I register my business for that? I am also setting myself up to take payment for appointment over the Web. Does that mean I also need to file for Internet commerce taxes, or is that strictly for online retail sales? Thank you for your time in advance.