In a medium bowl, combine olive oil, turmeric, cumin, smoked paprika, sea salt, black pepper, and lemon juice to create a marinade.
Add chicken thighs to the bowl, ensuring they are well-coated with the marinade. Let marinate for at least 30 minutes, or up to 2 hours in the refrigerator.
Heat a grill or skillet over medium-high heat. Cook the marinated chicken for about 5-7 minutes on each side, or until fully cooked and golden brown.
Remove the chicken from heat and let it rest for a few minutes before slicing.
Warm corn tortillas in a dry skillet or microwave until pliable.
Assemble the tacos by placing sliced chicken on each tortilla, then topping with avocado slices, shredded cabbage, and chopped cilantro.
Serve with lime wedges for an extra burst of flavor.