Rituximab (Rituxan and MabThera) is a drug used to treat rheumatoid arthritis that has not improved with other types of medications, as well as certain forms of vasculitis. It works by turning off a part of the immune system that is not working properly in autoimmune diseases.
For the purpose of this sales tax exemption, âdirectlyâ means having an immediate effect on an item or in an activity, without an intervening, ancillary or prior effect.
In every state that imposes a sales tax, the general rule is that each retail sale of tangible personal property is presumed to be taxable. In other words, if you make retail sales, you generally must collect or pay sales tax with respect to each sale unless you can show that the sale was somehow exempt from tax.ach state offers its own unique set of exemptions from its sales tax. In general, exemptions are provided on the based upon: 1  the type of property being sold, 2  the identity of the purchaser, or. 3  the use to which the property will be put.