Two years ago I planted a couple of Tangerine Beauty Crossvines and Pink Jasmines and I am not sure how far back to prune them.
That is pretty much up to you. I would suggest not pruning those two now as they are spring bloomers. If you want to prune them to shape plants or control their size, do so after blooming. They will set buds in mid to late summer for the next season's blooms and should not be pruned after early to mid summer.
Thanks for the question. Please stop in again soon!