If the jackfruit is not already shredded, use a knife to roughly chop, or pulse a few times in a food processor.
Add the olive oil to a medium skillet over medium-high heat. Stir in the jackfruit, chili powder and garlic salt and let cook 3 minutes. Stir in the salsa, then season with salt and pepper and turn the heat to low. Let cook for an additional 3 minutes. Serve on tortillas or taco shells with desired toppings.