Tip - Do I Need a Business License for an Online Store?

If I'm getting started in the world of online retail, and I am trying to find out what steps to take as far as license, permits and so on. Do I need a business license before I launch my online store? Are the requirements different for independent sellers on websites such as Etsy and eBay than they are for business owners with dedicated websites for selling their merchandise?
Tags: Sales,Legal,Selling Online