Heat the olive oil in a large pot over medium heat. Add the ground turkey and cook until browned, about 3 minutes. Stir in the taco seasoning mix and cook for 1 minute. Drain off any excess grease. Remove from the pot and reserve.

In the same pot, add the onion and cook until softened, about 5 minutes. Add the diced tomatoes, and ½ cup of the bean liquid.

Return the turkey meat to the pot, along with the black beans. Mix and cook everything together for 5 more minutes until the flavors melt. Bring to a boil, then reduce heat and simmer for 20 minutes, or until the chili has thickened.

Add the corn kernels immediately before serving, or next to the chili as a garnish.