Heat oil in a small saucepan over medium heat. Add jackfruit; cook and stir for 2 to 3 minutes. Add 1 tablespoon water and taco seasoning; stir until well combined, about 1 minute. Add additional water 1 tablespoon at a time as needed.
Place a small amount of jackfruit in each taco shell; add 2 tablespoons salsa.
