Bureau of Internal Revenue-Letter of Authority is a service that helps businesses comply with the relevant laws and regulations in the Philippines. This service includes assistance with obtaining a Letter of Authority from the Bureau of Internal Revenue that allows businesses to conduct an audit or investigation of their tax records. This service also includes advice and guidance on understanding and complying with the relevant laws and regulations, as well as helping businesses to prepare for an audit or investigation. Bureau of Internal Revenue-Letter of Authority services help businesses to remain in good standing with the government and ensure that their tax records are accurate and up to date.