Place the chicken into the slow cooker. In a bowl, whisk together the chicken broth, ranch seasoning mix, and taco seasoning. Pour the mixture over the chicken. Cook the chicken on low for about 3 1/2 hours or 1 1/2 hours on high.
Remove the chicken and shred with a fork. Place the shredded chicken back into the slow cooker and cook for another 10 minutes.
Use a slotted spoon and spoon the chicken onto a tortilla and top with desired toppings.