Put the chicken breast in your crockpot and cover with all the enchilada sauce. Cook on low 6-8 hours or on high 3-4 hours.
Take the chicken out and shred it with two forks.
Return the chicken to the crockpot and add the drained black beans, drained corn, and 1 cup of cheese.
Cut the soft corn tortillas in quarters and add them to the crockpot as well.
Mix all ingredients and then flatten the top. Top with the remaining cheese. Cook on low 1 hour.