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Receiving a notice from the Bureau of Internal Revenue (BIR) can be a daunting experience for any taxpayer. Understanding the procedural "rigmarole" of a tax audit is essential to protecting your business and ensuring due process. This guide breaks down the critical stages and timelines of a BIR tax assessment.
Understanding the BIR Tax Assessment

image.php?image=b17eva767.jpg&dl=1A BIR tax assessment is the official process where the bureau examines a taxpayer’s books and records to determine if the correct amount of internal revenue taxes has been paid. It is not an immediate demand for payment but rather a systematic audit to identify potential deficiencies.
The Timeline: How Long Does the BIR Have to Assess?

Under Section 203 of the Tax Code, the BIR generally has three (3) years to assess deficiency taxes. This period is counted from the date the return was actually filed or the deadline for filing, whichever is later. However, this period extends to ten (10) years in cases of:

Failure to file a return.

Filing a false or fraudulent return with intent to evade tax.

First Steps: Receiving a Letter of Authority (LOA)

The Letter of Authority (LOA) is the "starting gun" of a tax audit. It is the document that empowers a Revenue Officer to examine your books. If you receive one:

Verify its validity: Check if it What is a Notice of Discrepancy (NOD)? signed by the Regional Director (or authorized official) and contains your correct details and the specific taxable year.

Organize records: Prepare your books of accounts, invoices, and receipts.

Consult a Professional: Engage a tax consultant immediately to manage communications with the BIR.

Identifying Discrepancies: The NOD and PAN

Before a formal assessment is issued, the BIR provides opportunities for reconciliation:

Notice of Discrepancy (NOD): This is an invitation to an informal conference where you can explain inconsistencies found during the audit. You typically have 30 days from receipt to present your side.

Preliminary Assessment Notice (PAN): If the NOD stage does not resolve the issues, the BIR issues a PAN. You have fifteen (15) days from receipt to file a written reply. If you fail to respond, the BIR will proceed to the next stage.

The Final Step: Protesting the FAN

The Final Assessment Notice (FAN), accompanied by a Formal Letter of Demand (FLD), is the BIR's final determination of your tax liability.

Can you protest it? Yes. You must file a formal administrative protest (either a Request for Reconsideration or Reinvestigation) within 30 days of receipt.

The 60-Day Rule: If you request a reinvestigation, What should I do if I receive a Letter of Authority (LOA)? you have 60 days from filing the protest to submit all supporting documents. Failure to do so makes the assessment "final, executory, and demandable."

Failure to Respond and Compromise Settlements

Ignoring a BIR assessment is high-risk. Failure to respond leads to the assessment becoming final, allowing the BIR to initiate collection through summary remedies like distraint of personal property or levy upon real property.

However, you can settle through a Compromise Settlement under Section 204 of the Tax Code. This is possible if:

There is doubtful validity of the assessment (e.g., it is arbitrary or lacks legal basis).

The taxpayer has financial incapacity (e.g., insolvency or 50% capital impairment). The minimum compromise rate is generally 40% of the basic tax for doubtful validity and 10% for financial incapacity.

Conclusion

A BIR assessment is a structured legal process, not an overnight penalty. By respecting the 15-day and 30-day windows and ensuring all responses are backed by legal and factual evidence, taxpayers can navigate audits fairly. When in doubt, always seek professional tax advice to ensure your rights to due process are upheld.
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