▁G SK ▁settled ▁the ▁largest ▁tax ▁dispute ▁in ▁I RS ▁history , ▁agree ing ▁to ▁pay ▁US $ 3 . 1   b ill ion . ▁At ▁issue ▁were ▁Z ant ac ▁and ▁other ▁products ▁sold ▁in ▁ 1 9 8 9 – 2 0 0 5 . ▁The ▁case ▁revol ved ▁around ▁int ra company ▁transfer ▁pr icing — det erm ining ▁the ▁share ▁of ▁profit ▁att rib utable ▁to ▁the ▁US ▁subs idi aries ▁of ▁G SK ▁and ▁subject ▁to ▁tax ▁by ▁the ▁I RS . ▁ ▁The ▁UK ' s ▁Ser ious ▁Fra ud ▁Office ▁( S FO ) ▁opened ▁a ▁criminal ▁inqu iry ▁in ▁ 2 0 1 4 ▁into ▁G SK ' s ▁sales ▁practices , ▁using ▁powers ▁granted ▁by ▁the ▁B ri ber y ▁Act ▁ 2 0 1 0 . ▁The ▁S FO ▁said ▁it ▁was ▁collabor ating ▁with ▁Chinese ▁authorities ▁to ▁investigate ▁bringing ▁charges ▁in ▁the ▁UK ▁related ▁to ▁G SK ' s ▁activities ▁in ▁China , ▁Europe ▁and ▁the ▁Middle ▁East . ▁Also ▁, ▁the ▁US ▁Department ▁of ▁Justice ▁was ▁investig ating ▁G SK ▁with ▁reference ▁to ▁the ▁Foreign ▁Cor rupt ▁Pract ices ▁Act . ▁ ▁Ac quisition - history ▁diagram ▁ ▁Gla x o Smith K line ▁Smith K line ▁Be ech am ▁Pl c ▁( R en amed ▁ 1 9 8 9 ) ▁Smith K line ▁Beck man ▁( R en amed ▁ 1 9 8 2 ) ▁Smith K line - R IT ▁( R en amed ▁ 1 9