I used to live in my house but now I am renting it out. Should I tell my home insurance company that I will no longer live there and tell them about the tenants?

RIGHT AWAY! you cannot have a homeowners policy if you the homeowner do not live in it. your policy needs to be rewritten as a landlord policy. this covers the dwelling (make sure you also keep liability on it). your tenants should then pick up a renters policy to cover their belongings. if you can find a company in your area that will write your property on a commercial package policy, it will keep your premium a lot lower. i have a company that does this and it actually gives them MORE coverages than a regular landlord policy for less premium.