5 /5 Terry Knowles: I enlisted the help of Jennifer Gellner about 2007 due to a serious challenge from IRS after a business bankruptcy. She was very professional, courteous and compassionate while holding a hard line and being very specific. She successfully negotiated an offer in compromise which I was able to clear up and begin a life, and her fees were fair and manageable. One will not regret contacting Jennifer Gellner.