Republic of the Philippines vs. First Gas Power Corporation

Waivers of the statute of limitations on tax assessment must strictly comply with RMO 20-90 and RDAO 05-01; the BIR’s date of acceptance must be indicated on the face of the waiver, and failure to do so renders the waiver defective and ineffectual, preventing any extension of the original three-year prescriptive period. Additionally, a Final Assessment Notice is invalid if it does not state a definite date for payment, as it fails to constitute an actual demand to pay.

First Gas Power Corporation received a Letter of Authority dated October 24, 2002 authorizing BIR examiners to audit its books for all revenue taxes for taxable years 2000 and 2001. Following the audit, Preliminary Assessment Notices were issued in December 2003 and January 2004, proposing deficiency income taxes of ₱84,571,959.65 for 2000, ₱97,999,363.41 for 2001, and late payment penalties of ₱4,670,630.18 for 2001. First Gas filed a Preliminary Reply on April 6, 2004. The BIR subsequently issued Final Assessment Notices and Formal Letters of Demand, all dated July 19, 2004, reducing the deficiency income tax to ₱37,099,915.29 for 2000 and ₱82,365,799.90 for 2001, and retaining the penalty assessment for 2001. The parties executed three successive waivers of the statute of limitations between April and August 2004, purportedly extending the assessment period to October 15, 2004.

• The Audit: On October 24, 2002, First Gas received a Letter of Authority from the BIR authorizing the examination of its books of accounts for all revenue taxes for the taxable years 2000 and 2001. A Notice to Taxpayer followed, and an informal conference was set for October 15, 2003.

• The Preliminary Assessments: First Gas received Preliminary Assessment Notices dated December 15, 2003 and January 28, 2004, proposing deficiency income tax of ₱84,571,959.65 for 2000, ₱97,999,363.41 for 2001, and late payment penalties of ₱4,670,630.18 for 2001. First Gas submitted a Preliminary Reply on April 6, 2004.

• The Waivers: Three Waivers of the Defense of Prescription were subsequently executed. The first waiver, dated April 12, 2004, extended the period to June 15, 2004; the second, dated June 14, 2004, extended it to August 15, 2004; and the third, dated August 13, 2004, extended it to October 15, 2004. All were signed by Celia C. King for the BIR and Nestor H. Vasay for First Gas. Critically, the date of acceptance by the BIR was not indicated on any of the waivers.

• The Final Assessments: On September 6, 2004, First Gas received Final Assessment Notices and Formal Letters of Demand, all dated July 19, 2004. For taxable year 2000, the deficiency income tax was assessed at ₱37,099,915.29, arising from alleged unreported income from pre-income tax holiday sales of electricity and unreported interest income from foreign investments and dollar loan proceeds prior to commercial operations. For taxable year 2001, the deficiency income tax of ₱82,365,799.90 was attributed to disallowed interest expense from dollar deposits in foreign banks and disallowed compensation expense. Late payment penalties of ₱4,670,630.18 for 2001 were also assessed. The due date for payment was left blank in each Final Assessment Notice.

• The Income Tax Returns: First Gas filed two ITRs for taxable year 2000 due to a change in its accounting period from fiscal year to calendar year: one on October 16, 2000 for the fiscal year ending June 30, 2000, and another on April 16, 2001 for the calendar year ending December 31, 2000. Accordingly, the three-year prescriptive periods under Section 203 of the NIRC expired on October 16, 2003 and April 16, 2004, respectively.

• Validity of the Waivers: The absence of the dates of acceptance in the waivers was a mere inadvertence or oversight and not a fatal error. The date of notarization should be presumed as the date of acceptance because that is when the waivers became public instruments. The waivers were signed and accepted by the BIR’s authorized official before the lapse of the period agreed upon.

• Estoppel: First Gas was estopped from questioning the validity of the waivers because it had requested their execution and signing.

• Prescription Not Raised Administratively: First Gas should not be allowed to raise the issue of prescription for the first time on appeal before the CTA, as it did not raise it during the administrative proceedings.

• Validity of the 2001 Final Assessment Notice: A notice of assessment does not need to state a specific payment date; it need only state the facts, law, rules and regulations, or jurisprudence on which it is based. The date of payment is not material to the validity of the assessment, and it suffices if the due date can be verified from the face of the notice or accompanying formal letter of demand.

• Invalidity of the Waivers: The waivers of the statute of limitations were defective because the BIR’s date of acceptance was not indicated on their face. This omission violated the mandatory requirements of RMO 20-90 and RDAO 05-01, rendering the waivers void and ineffectual to extend the prescriptive period.

• Prescription of the 2000 Assessment: Because the waivers were invalid, the original three-year prescriptive period under Section 203 of the NIRC was never extended. The Final Assessment Notice for taxable year 2000, received on September 6, 2004, was issued beyond the last prescriptive deadline of April 16, 2004, and therefore the assessment was void.

• Invalidity of the 2001 Final Assessment Notice: The Final Assessment Notice for taxable year 2001 failed to specify a definite date for payment, as the due date was left blank. Without a definite due date, there was no actual demand to pay, and the assessment was consequently invalid.

• Prescription of the 2000 Assessment: Whether the waivers of the statute of limitations validly extended the three-year period to assess deficiency income tax for taxable year 2000, and whether the assessment was barred by prescription.

• Validity of the 2001 Final Assessment Notice: Whether the Final Assessment Notice for taxable year 2001 was valid despite lacking a definite due date for payment.

• Prescription of the 2000 Assessment: The waivers were defective and did not extend the prescriptive period. RMO 20-90 and RDAO 05-01 mandatorily require that the BIR’s date of acceptance be indicated in the waiver. The first waiver lacked this date, making it impossible to determine with certainty whether it was accepted before the expiration of the original three-year period. Because the first waiver was void, the two subsequent waivers were likewise invalid; there was no longer any period to extend, the original periods having lapsed on October 16, 2003 and April 16, 2004. The Final Assessment Notice for 2000, received on September 6, 2004, was therefore issued beyond the prescriptive period and is void. The date of notarization cannot serve as a substitute for the date of acceptance, as the notary public is distinct from the Commissioner, and the BIR representative was not even present during notarization. Estoppel cannot cure the defective waivers; the BIR, having itself issued the applicable rules, must strictly comply with them. Finally, prescription may be raised at any stage, even on appeal, and the CTA may motu proprio dismiss a claim on that ground.

• Validity of the 2001 Final Assessment Notice: The Final Assessment Notice for 2001 was invalid because the due date for payment was left blank. A valid assessment must contain a definite date by which the taxpayer must pay; without it, there is no actual demand to pay. The mere reference to an enclosed assessment notice where the due date “should be” shown, but was in fact blank, renders the assessment fatally deficient. The assessment fails to state a specific period for compliance and is therefore void.

• Strict Compliance for Waivers of the Statute of Limitations — Under RMO 20-90 and RDAO 05-01, a valid waiver of the three-year prescriptive period under Section 222(b) of the NIRC must strictly comply with all formal requisites, including: (1) use of the proper form; (2) signature by the taxpayer or duly authorized representative (with notarized authority if delegated); (3) notarization; (4) signature of the Commissioner or authorized revenue official indicating BIR acceptance, with the date of acceptance stated; (5) both dates of execution by taxpayer and acceptance by BIR must be before expiration of the period; and (6) execution in three copies with proof of receipt by the taxpayer. Failure to indicate the date of acceptance renders the waiver defective and ineffectual, and the original prescriptive period is not extended. This doctrine was applied to invalidate the waivers, as the first waiver lacked the acceptance date, and the subsequent waivers could not revive an already-lapsed period.

• Estoppel Inapplicable to Defective Waivers — The doctrine of estoppel cannot validate an act prohibited by law or against public policy. The BIR cannot invoke estoppel against a taxpayer to cure its own failure to observe the mandatory procedures it itself promulgated. Because waivers of the statute of limitations derogate the taxpayer’s right to security against prolonged investigation, they must be carefully and strictly construed against the government. The BIR’s failure to ensure the waiver’s compliance with its own rules binds the BIR, not the taxpayer.

• Prescription May Be Raised at Any Stage — Under Section 1, Rule 9 of the Rules of Court, if the pleadings or evidence on record show that a claim is barred by prescription, the court is mandated to dismiss the claim even if prescription is not raised as a defense. The CTA, pursuant to Section 1, Rule 14 of the Revised Rules of the CTA, may rule on issues not specifically raised by the parties if necessary for an orderly disposition of the case.

• Definite Due Date Required for a Valid Assessment — A Final Assessment Notice is invalid if it fails to state a definite date by which the taxpayer must pay the deficiency. Without a definite due date, the notice does not contain an actual demand to pay and cannot serve as a valid assessment.

• “The date of acceptance by the Bureau of Internal Revenue should be indicated. … The other defect noted in this case is the date of acceptance which makes it difficult to fix with certainty if the waiver was actually agreed before the expiration of the three-year prescriptive period.” — Reiterating the mandatory nature of the acceptance date, citing Philippine Journalists, Inc. v. Commissioner of Internal Revenue.

• “The doctrine of estoppel cannot be applied in this case as an exception to the statute of limitations on the assessment of taxes considering that there is a detailed procedure for the proper execution of the waiver, which the BIR must strictly follow. … [T]he BIR cannot hide behind the doctrine of estoppel to cover its failure to comply with RMO 20-90 and RDAO 05-01, which the BIR itself issued.” — Commissioner of Internal Revenue v. Kudos Metal Corporation, explaining why the government cannot rely on estoppel when it is the party responsible for the defects.

• “If the pleadings or the evidence on record show that the claim is barred by prescription, the court is mandated to dismiss the claim even if prescription is not raised as a defense.” — Bank of the Philippine Islands v. Commissioner of Internal Revenue, confirming that prescription is not waivable by procedural omission.

• “The notice, therefore, did not contain a definite and actual demand to pay.” — Commissioner of Internal Revenue v. Fitness By Design, Inc., invalidating an assessment with a blank due date.

• Commissioner of Internal Revenue v. Kudos Metal Corporation, 634 Phil. 314 (2010) — Laid down the full list of requisites for a valid waiver and held that the absence of the date of acceptance invalidates the waiver. Followed and applied as controlling precedent.

• Commissioner of Internal Revenue v. Standard Chartered Bank, 765 Phil. 102 (2015) — Held that RMO 20-90 and RDAO 05-01 are mandatory and require strict compliance; invalidated waivers lacking the date of acceptance and failing to comply with other formalities. Followed.

• Philippine Journalists, Inc. v. Commissioner of Internal Revenue, 488 Phil. 218 (2004) — Discussed the importance of the date of acceptance in establishing whether the waiver was agreed upon before prescription expired. Followed.

• Commissioner of Internal Revenue v. FMF Development Corporation, 579 Phil. 174 (2008) — Held a waiver defective for lacking the date of acceptance, reiterating that it is necessary to determine whether the waiver was validly accepted before the original period lapsed. Followed.

• Commissioner of Internal Revenue v. Fitness By Design, Inc., 799 Phil. 391 (2016) — Ruled that a Final Assessment Notice without a due date is invalid for lack of a definite demand to pay. Followed.

• Bank of the Philippine Islands v. Commissioner of Internal Revenue, 738 Phil. 577 (2014) — Held that prescription may be given effect even if raised for the first time on appeal, as courts may motu proprio dismiss on that ground. Followed.

• Commissioner of Internal Revenue v. Lancaster Philippines, Inc., 813 Phil. 622 (2017) — Confirmed that the CTA may rule on issues not stipulated by the parties to achieve an orderly disposition. Followed.

• Section 203, National Internal Revenue Code — Mandates that internal revenue taxes shall be assessed within three years after the last day prescribed by law for filing the return, or from the day the return was filed if filed late. Applied to determine that the prescriptive periods for First Gas’s 2000 deficiency tax expired on October 16, 2003 and April 16, 2004.

• Section 222(b), National Internal Revenue Code — Allows extension of the prescriptive period by written agreement between the Commissioner and the taxpayer executed before the expiration of the original period. Applied as the statutory basis for waivers, but the waivers were not executed in conformity with the implementing rules.

• RMO 20-90 and RDAO 05-01 — Bureau of Internal Revenue issuances prescribing the formal requisites for a valid waiver, including the requirement that the date of acceptance by the BIR be indicated. Interpreted as mandatory; strict noncompliance renders the waiver defective.

• Section 1, Rule 9, Rules of Court — Provides that the court shall dismiss a claim if the pleadings or evidence show it is barred by the statute of limitations. Applied to allow the issue of prescription to be considered despite being raised only on appeal.

• Section 1, Rule 14, A.M. No. 05-11-07-CTA (Revised Rules of the Court of Tax Appeals) — Authorizes the CTA to rule on related issues not stipulated by the parties to achieve an orderly disposition of the case. Applied to support the CTA’s consideration of the prescription issue.

Chief Justice Alexander G. Gesmundo (Chairperson), Justices Alfredo Benjamin S. Caguioa, Amy C. Lazaro-Javier, and Mario V. Lopez (ponente) concurred.