Add chipotle, peaches, and tomato sauce; simmer for 20 minutes, then blend until smooth.
Cook chicken breasts skin-side down for 5 minutes, flip, add sauce, cover, and simmer 20 minutes.
Shred cooked chicken, return to sauce, and cook 15 minutes until thickened. Season with salt.
Prepare slaw by mixing cabbage, cilantro, lime juice, and salt. Warm tortillas and assemble tacos with slaw, peaches, jalapenos, chicken, and green onions.
Notes
For extra flavor, grill the chicken before shredding.