XVI. Mr. Tiaga has been a law-abiding citizen diligently paying his income taxes. On May 5, 2014, he was surprised to receive an assessment notice from the Bureau of Internal Revenue (BIR) informing him of a deficiency tax assessment as a result of a mathematical error in the computation of his income tax, as appearing on the face of his income tax return for the year 2011, which he filed on April 15, 2012. Mr. Tiaga believes that there was no such error in the computation of his income tax for the year 2011. Based on the assessment received by Mr. Tiaga, may he already file a protest thereon? (4%)