By Ellen Chang Tax season is very profitable for hackers. Cyber criminals are fond of tax fraud because it is a simple business operation that has high financial rewards. The crimes committed are “done almost in an assembly line manner,” Jason Glassberg, co-founder of Casaba Security, a Redmond, Washington-based cybersecurity company that specializes in ethical hacking and security program development, told TheStreet. “You simply fill out as many personal tax filings as you can as early in the season as possible and collect the refunds,” he said. “Ever since the IRS enabled direct deposits, in…