We are required to collect sales tax on orders before shipping charges for the following states:

ArizonaMassachusetts
CaliforniaMissouri
ColoradoNevada
Idaho                       North Dakota                   
IllinoisOklahoma
IowaUtah
LouisianaWyoming 
MaineVirgina
Maryland 

We are required to collect sales tax on orders after shipping charges for the following states:

AlabamaNew Mexico
Alaska (some remote areas exempt)New York
ArkansasTennessee
ConneticutNorth Carolina
FloridaOhio
Georgia                                   Pennsylvania 
HawaiiRhode Island
IndianaSouth Carolina
KansasSouth Dakota
KentuckyTexas 
MichiganVermont
MinnesotaWashington                              
MississippiWashington D.C.
NebraskaWisconsin
New JerseyWest Virginia

States that Do Not Charge Sales Tax:

Delaware
Montana
New Hampshire
Oregon