GOOD EVENING IM NEED HELP WITH MY ITUE GIFT CARD THAT IS READING INVAILD OR NOT ACTIVATE

Are you able to try taking it back to the store that you bought it from and ask them to activate it properly ? If not then you will need to try contacting iTunes Support (these are user-to-user forums) : http://www.apple.com/support/itunes/contact/ - click on Contact iTunes Store Support on the right-hand side of the page, then iTunes Cards And Codes (you will probably need to give them images of the front and back of the card, and possibly its receipt)