G.R. No. 178788; September 29, 2010
UNITED AIRLINES, INC., Petitioner, vs. COMMISSIONER OF INTERNAL REVENUE, Respondent.

FACTS

Petitioner United Airlines, Inc., a U.S. carrier, ceased its passenger flights originating from the Philippines in February 1998 but continued cargo operations until January 2001. For the taxable year 1999, it paid income tax on its Gross Philippine Billings (GPB), including tax on passenger revenue from tickets sold in the Philippines for flights that did not originate therein. Claiming this tax was erroneously collected under the revised GPB definition in the 1997 NIRC and the RP-US Tax Treaty, petitioner filed a claim for refund of Php 5,028,813.23. The claim was elevated to the Court of Tax Appeals (CTA) after the Commissioner failed to act.
The CTA First Division, while agreeing petitioner could not be taxed on the off-line passenger revenue, denied the refund claim. It found that in computing its tax on cargo revenue, petitioner erroneously deducted commissions and incentives from its gross cargo revenue of Php 2.84 billion before applying the GPB tax rate. The correct GPB tax on the undeducted gross cargo revenue resulted in a substantial underpayment of Php 31.43 million for 1999, which exceeded the refund claim. The CTA En Banc affirmed this decision.

ISSUE

Whether the CTA correctly denied petitioner’s claim for a tax refund based on its finding of a tax underpayment on a different revenue stream (cargo).

RULING

Yes. The Supreme Court denied the petition and affirmed the CTA En Banc. The Court clarified that the CTA did not offset liabilities nor make a deficiency assessment. In a judicial claim for refund, the taxpayer bears the burden of proving not only that it made an overpayment but also that it has no outstanding tax liabilities for the same period. The CTA, in determining the propriety of the refund, is duty-bound to examine the taxpayer’s entire tax payment for the year in question. Petitioner’s claim for a refund on passenger revenue was scrutinized alongside its payment for cargo revenue, as both fall under the same GPB tax base for the taxable year 1999.
The legal logic is that a claim for refund is contingent upon the taxpayer satisfying its total correct tax liability for the period. The finding of a net underpayment, after a holistic review of the tax paid on all applicable revenues (passenger and cargo), means petitioner failed to establish its entitlement to a refund. The CTA’s computation was a necessary exercise of its jurisdiction to adjudicate the refund claim, not an assessment. Since petitioner’s correct total tax liability for 1999 exceeded its total payments, no refund was due. The Court also found no violation of due process, as the tax deficiency arose from petitioner’s own submitted data and the application of the law on gross revenue.