How can i crate train my dog?

my dog is a 6 year old (human years) shih tzu mix recently we moved into a duplex she used to be a outside dog but now she stays outside while we are at home and when it gets dark we put her into a crate she wont stop barking we tried everything the only way she wil stop is if we let her out and if we do that she will scratch up our walls and hardwood flooring and our landlord would be mad if you have any ideas please help mee its urgent because our neighboors might file a complaint because of her barking plz help!!!!!!!!!!!!!!!!!!!!!!!!11