A. 1. Ensure that the coupons are valid and not expired. 2. Check if the items in your cart qualify for the coupons you are trying to apply. 3. If the coupon does not apply, try removing it and adding it back again before checkout.

B. 1. Clear the app's cache to refresh the coupon data. 2. If the issue continues, consider using the CVS website to apply coupons during checkout.