This concept is popularly known as the “5x5 Rule.” This rule implies that the number five has its own significance in different fields. In mathematics, five is the only prime number ending in “5”. From a tax perspective, five may be a dreaded number for taxpayers engaged in trade or business because it symbolizes the five-year validity period of their Authority to Print (ATP) or Permit to Use (PTU) computerized accounting system (CAS), cash register machines (CRM), and point-of-sale (POS). Hence, all PTUs to be issued shall be valid unless revoked by the BIR on grounds such as the following:1. While the number five may have different meanings, affected taxpayers may now rest easy, focus on what truly matters, and declare that to them, five is just a number.

Source: Philippine Star October 11, 2022 03:55 UTC