To formally protest a tax assessment in the Philippines, your letter must strictly comply with and relevant Revenue Regulations (e.g., RR 18-2013) to avoid being declared void. You must file this letter within 30 days of receiving the Final Assessment Notice (FAN) or Formal Letter of Demand (FLD). Sample Protest Letter Template
[e.g., Pursuant to Section [Number] of the NIRC, the taxpayer is exempt from...] sample protest letter tax assessment philippines