I am thinking about starting a small business on the web to sell programs that I have made, but I realized that there may be things I am not accounting for, like taxes. I am only selling them for about $5-$10, so I do not want to go through more trouble than it's worth. If I just charge people through PayPal, is there anything else I should know before I can start selling... e.g. taxing, registering business somewhere, other legal issues... or am I exempt from all that since I'm running it myself and it is online-only? If anyone knows this off the top of his/her head, I would appreciate it rather than reading through complicated information at, say sba.com. Thanks.