A Chappaqua-N.Y. based CPA has been sentenced to 33 months in prison for pocketing more than $320,000 of his clients' tax refunds over 11 years, according to the U.S. Attorney's Office in the Southern District of New York.Randal Kase, 56, stole at least 60 refunds between 1998 and 2009 by having the refund checks mailed to himself and then forging his clients' signatures. He stated, falsely, that his clients had signed the refund checks over to him.