Heat olive oil in a large skillet over medium heat.
Add chopped onion to the skillet and sauté until translucent.
Stir in minced garlic and cook for an additional minute.
Sprinkle in cumin, smoked paprika, and chili powder, mixing thoroughly.
Add chicken breasts to the skillet, stirring to coat in spices.
Pour in chicken broth and bring to a simmer.
Cover the skillet and reduce heat to low, cooking for 20-25 minutes.
Remove chicken from skillet and shred using two forks.
Return shredded chicken to the skillet and stir to combine with juices.
Warm the corn tortillas in a dry skillet over medium heat until pliable.
Assemble tacos with pulled chicken and your choice of toppings.