Royalty Tax and Financial Services

He wrote the wrong information and exemption for my Tax Return 2016. After two years, I got a letter from the IRS that I should return back some grand plus penalty. It was his fault, not me. He promised to fix it, but he didn't take care. After four months I got a second letter with the penalty and interest fee for two years and a half, I had to pay too much money to the IRS for his fault!!!