United Airlines, Inc. vs. Commissioner of Internal Revenue

A claim for tax refund cannot be granted if the tax return upon which it is based contains understatements or undervaluations, and the taxpayer's underpayment on other tax liabilities for the same period exceeds the refund sought.

United Airlines, Inc., a foreign corporation engaged in the international airline business, ceased passenger flights originating from the Philippines on February 21, 1998, but continued cargo flights until January 31, 2001. On April 12, 2002, petitioner filed a claim for income tax refund for taxable years 1999 to 2001, asserting that its 1999 passenger revenue was not subject to Philippine income tax under the NIRC and the RP-US Tax Treaty because it no longer operated passenger flights from the Philippines.

• Cessation of Passenger Flights: Petitioner ceased operating passenger flights to and from the Philippines beginning February 21, 1998, appointing Aerotel Ltd. Corp. as an independent general sales agent, while continuing cargo flights until January 31, 2001.
• Claim for Refund: On April 12, 2002, petitioner filed a claim for refund of ₱15,916,680.69 in income taxes paid on gross passenger and cargo revenues for 1999 to 2001. The claim included ₱5,028,813.23 representing income taxes paid in 1999 on passenger revenue from tickets sold in the Philippines but uplifted outside the Philippines.
• CTA Findings on Gross Philippine Billings: The CTA First Division ruled that petitioner was not taxable on its 1999 passenger revenue from flights originating outside the Philippines. However, it found that petitioner had erroneously deducted ₱141.79 million in commissions and ₱1.98 billion in agent incentives from its gross cargo revenue of ₱2.84 billion. Because the GPB tax under Section 28(A)(3)(a) of the NIRC applies to total revenue before any deductions, the CTA determined that petitioner underpaid its cargo revenue tax by ₱31.43 million, an amount exceeding the ₱5.03 million refund sought on passenger revenue.

• Prohibition Against Off-Setting: Petitioner argued that denying the refund based on a larger underpayment constitutes illegal offsetting of tax liabilities, which is prohibited by well-settled jurisprudence holding that taxes cannot be subject to set-off or compensation.
• Violation of Due Process: Petitioner maintained that the CTA effectively assessed a deficiency without a valid assessment from the Commissioner of Internal Revenue, violating procedural due process under Section 228 of the NIRC, which requires that a taxpayer be informed in writing of the basis of any assessment.
• Lack of Jurisdiction: Petitioner asserted that the CTA acted in excess of its jurisdiction by determining a tax deficiency, as the exclusive appellate jurisdiction of the CTA covers only disputed assessments and the authority to issue assessments is vested solely in the CIR.
• Prescription: Petitioner contended that any assessment for deficiency income tax for 1999 was already barred by prescription, as the three-year prescriptive period from the filing of the return had expired.

• Jurisdiction of the CTA: Respondent countered that the CTA acted within its jurisdiction in determining entitlement to the refund. The determination of the correct tax paid was necessary to ascertain the validity of the refund claim, not to impose a deficiency assessment.

• Entitlement to Refund: Whether petitioner is entitled to a refund of erroneously paid income tax on passenger revenues for 1999.
• Off-Setting of Tax Liabilities: Whether the CTA erred in denying the refund based on the finding that petitioner underpaid its cargo revenue tax by an amount exceeding the refund sought.
• Jurisdiction and Due Process: Whether the CTA acted in excess of its jurisdiction and violated due process by determining a tax deficiency without a formal assessment from the CIR.
• Prescription: Whether any assessment for deficiency income tax for 1999 is barred by prescription.

• Entitlement to Refund: The refund was properly denied. While petitioner is not liable for the GPB tax on passenger revenues after ceasing passenger flights, it underpaid its cargo revenue tax by a larger amount due to unauthorized deductions.
• Off-Setting of Tax Liabilities: The denial of the refund did not constitute illegal offsetting. Under Section 72 of the NIRC, no tax collected under a return containing an understatement shall be recovered unless the return is proven true. A refund claim assumes the validity of the tax return; once the return is found erroneous, the refund cannot be granted. Resolving the deficiency jointly with the refund claim avoids multiplicity of suits and conceptual absurdity, as a taxpayer cannot be entitled to a refund while liable for a deficiency for the same year.
• Jurisdiction and Due Process: The CTA did not exceed its jurisdiction or violate due process. The CTA merely determined the factual basis for the refund claim, which inherently required determining the correct tax due. No formal assessment by the CIR was necessary for the CTA to find that the return was erroneous.
• Prescription: The issue of prescription is immaterial. The prescriptive periods under Sections 203 and 222 of the NIRC find no application when the court is determining the net tax due based on a return found to contain understatements.

• Prohibition Against Off-Setting of Taxes — Taxes cannot be subject to set-off or compensation because the government and the taxpayer are not mutually creditors and debtors; debts are due to the government in its corporate capacity, while taxes are due in its sovereign capacity. However, a claim for refund and a deficiency assessment for the same year are inextricably intertwined, and resolving them jointly avoids multiplicity of suits and conceptual absurdity.
• Section 72, NIRC (False or Fraudulent Returns) — When an assessment is made on a return that is false, fraudulent, or contains an understatement, no tax collected shall be recovered unless the return is proven true. A claim for refund is founded on the assumption that the return is valid; a finding of understatements invalidates this assumption and precludes recovery.
• Strict Construction of Tax Refunds and Exemptions — Tax refunds, like tax exemptions, are construed strictly against the taxpayer and liberally in favor of the taxing authority.

• "The grant of a refund is founded on the assumption that the tax return is valid, that is, the facts stated therein are true and correct. The deficiency assessment, although not yet final, created a doubt as to and constitutes a challenge against the truth and accuracy of the facts stated in said return which, by itself and without unquestionable evidence, cannot be the basis for the grant of the refund."
• "To avoid multiplicity of suits and unnecessary difficulties or expenses, it is both logically necessary and legally appropriate that the issue of the deficiency tax assessment against Citytrust be resolved jointly with its claim for tax refund, to determine once for all in a single proceeding the true and correct amount of tax due or refundable."

• South African Airways v. Commissioner of Internal Revenue — Followed. Defined the application of Section 28(A)(3)(a) of the NIRC, holding that international carriers maintaining flights to and from the Philippines are taxed on GPB, while those not maintaining flights are taxed on income from other activities.
• Commissioner of Internal Revenue v. Court of Tax Appeals (Citytrust) — Controlling precedent. Established that a claim for refund and a deficiency assessment for the same year are inextricably intertwined and must be resolved jointly to avoid multiplicity of suits and conceptual absurdity.
• Philex Mining Corporation v. Commissioner of Internal Revenue — Followed. Reiterated the distinction between taxes and debts, holding that taxes cannot be subject to compensation.
• Francia v. Intermediate Appellate Court — Followed. Held that taxes cannot be subject to set-off or compensation against claims the taxpayer may have against the government.
• Caltex Philippines, Inc. v. Commission on Audit — Followed. Reiterated that taxes cannot be the subject of compensation.

• Section 28(A)(3)(a), 1997 NIRC — Imposes a 2½% tax on "Gross Philippine Billings" of international air carriers doing business in the Philippines. Applied to determine that petitioner was not liable for GPB tax on passenger revenue after ceasing passenger flights, but was liable for cargo revenue.
• Article 4(7) and Article 9, RP-US Tax Treaty — Govern the source of income and taxation of shipping and air transport between the Philippines and the US. Cited by petitioner to argue exemption from Philippine income tax on passenger revenue.
• Section 72, 1997 NIRC — Prohibits recovery of taxes collected under a false, fraudulent, or understated return unless the return is proven true. Applied to deny the refund because petitioner's return contained understatements of gross cargo revenue.
• Section 228, 1997 NIRC — Requires that a taxpayer be informed in writing of the law and facts on which an assessment is made. Cited by petitioner to argue due process violation, but found inapplicable as the CTA was not making an assessment.
• Sections 203 and 222, 1997 NIRC — Provide the periods of limitation upon assessment and collection of taxes. Held to find no application in the case, as the CTA was determining net tax due based on an erroneous return, not enforcing a deficiency assessment.

Conchita Carpio Morales, Arturo D. Brion, Lucas P. Bersamin, Maria Lourdes P.A. Sereno