I owed federal back taxes for the past 10 years. Kamyar settled my back tax debt for 1/4 of the original liability. The IRS had told him at first that they were not going to settle my taxes for less. But he worked with the IRS representatives in order to convince the government to reduce my large tax debt to an amount that i could afford to pay. During the course of representation which took more than a year, he always answered  my phone calls and emails personally even on weekends and holidays. He was also available to meet with me if i wanted to discuss my case. He is very knowledgeable and has a high degree of professionalism. If you have a tax issue, i highly recommend Mehdiyoun Law Firm.