35 Miss. Code R. § 4-04-04-103
A photographer who creates digital images that are marketed via the internet through a third party that also prints the images as photographs and delivers them to purchasers is subject to sales tax as long as the photographer controls the sales of the images. The photographer will be considered to control the sale of the images if the website on which the images are posted appears to be the photographer's own site; the photographer is able to design or direct the appearance of the site from which the images are sold; the photographer sets the price for the images; the photographer determines how long the images will be offered on the website for sale; the photographer displays the website address on his marketing materials directing customers to the site to purchase his images; and/or the photographer otherwise exercises control over the marketing, sale or reproduction of the images he creates.
35 Miss. Code. R. § 4-04-04-103