Write the next sentence in the following story.

How to hire a tax resolution company you can trust
Be leery of demands that the company be paid in full upfront.
Trust is a two-way street. If you can trust that the company will provide the services as promised in their agreement, they in turn must trust that you will pay them and begin working 100% for you upon receiving a " good faith " retainer.
Decide on the type of company you want to work with. There are 3-main types of companies that can assist you.