There are several synonyms for the word NIRC, such as National Internal Revenue Code, Philippine Tax Code, and Tax Reform Act. These terms all refer to the body of laws that govern taxation in the Philippines. The National Internal Revenue Code outlines the rules and regulations for taxation in the country, including income tax, value-added tax, and excise tax. The Philippine Tax Code is another name for the NIRC, and it is the product of various amendments and revisions over the years. The Tax Reform Act, on the other hand, refers specifically to the latest changes and updates to the NIRC that was signed into law in 2017.