I have a Jasmine that bloomed 2 years ago, i kept it as an indoor plant, and it recently died. There was still branches on it, so i stuck it in a back crawl space and now i'm wondering how to bring it back to life this spring, if i even can?? It's a Jasminum Polyanthum.

Jasmine doesn't have a true dormant period. Usually allowing the soil to get completely dried out is enough to permanently kill the roots and the plant.

I don't have much hope for it, but you can take it out, water it thoroughly, put it in a sunny window, and wait for two weeks. If you don't see any signs of life by then, chuck it.