My airbag light came on after jump dead battery, how to reset it?

Hello, you will have to find someone with a diagnostic tool to evaluate why the light has come on. There is no way to just "reset it". Try one of these repair shops near you: http://repairpal.com/porsche-within-10-miles-of-hebron-connecticut-06248

Just to add another possibility and a DIY friendly test .. When a problem like this appears immediately following a jump start there is a VERY GOOD CHANCE a fuse has opened (blown) .. Strongly suggest checking or testing the fuses before seeking another soulition! ... Fuse location and function can be found in the index (back pages) of the owners manual.... Fuse listing may read > SRS or AIR-BAG.