Three New Jersey pharmacies were penalized for selling COVID-19 antigen test kits that were not authorized for at-home use and for not properly displaying the price of the tests, the New Jersey Attorney General’s Office announced Thursday afternoon. A fourth was fined only for not properly advertising the price of the tests. “COVID testing, in addition to vaccination, has been essential to New Jersey’s recent return to normalcy,” Acting Attorney General Matthew J. Platkin said in a statement. “While New Jersey residents have joined together in fighting COVID-19, unfortunately there are still s…