After working with Pinnacle for some time I decided to take things into my own hands. I wasn't seeing much of a difference with my tax situation and my wife was getting angrier and angrier with me. So, I called the IRS myself. They worked with me more than Pinnacle had. I set up a payment plan, discussed the interest on the taxes, and much more. My advice would be to just deal with the IRS directly before you even call these guys.