I have 4 dogs 2 are germen shepards and 2 are chihuahuas and only 1 female and all the dogs are fixed and 1 of the germen shepards is always peeing on furniture or corners of the bed on top of the bed right after he's been outside,What can I do please help I've tried everything.

You can go to petsmart/petco and purchase a belly band.. its basically a diaper for male dogs. It wraps around the waist where the penis is. It will help prevent your dog from wrecking your home.