In 2010, pursuant to a Letter of Authority (LA) issued by the Regional Director, Mr. Abcede was assessed deficiency income taxes by the BIR for the year 2009. He paid the deficiency. In 2011, Mr. Abcede received another LA for the same year 2009, this time from the National Investigation Division, on the ground that Mr. Abcede's 2009 return was fraudulent. Mr. Abcede contested the LA on the ground that he can only be investigated once in a taxable year. Decide.